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Thitinai Gaewdang, Ngamnit Wongcharoen, Auppatham Nakaruk, Nattaporn P ...
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セッションID: B-13
発行日: 2006/11/08
公開日: 2017/06/19
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SnO_2: F,Sb thin films were prepared by an ultrasonic spray pyrolysis method. The as-deposited films were annealed at 500℃ in three different conditions: in nitrogen, in air and in vacuum respectively. The XRD analysis showed that the undoped SnO_2 films grown in (200) preferred orientation whereas the fluorine and antimony doped films grown in (110) plane. Sheet resistance and resistivity values decrease to minimum value when films were annealed in N_2. Optical transmittance percentage in the IR region decreases in the annealed films. For the films were annealed in N_2, the lowest percentage of transmittance values in IR region was also elucidated.
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Suparerk Aukkaravittayapun, Yu Liang Deng, Rabiab Suwanksum, Jajira Kh ...
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セッションID: B-14
発行日: 2006/11/08
公開日: 2017/06/19
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Punching tools made of hardening SKH51 high speed steel were implanted with nitrogen ion beam to treat the punchers and 〜3-4 time lifetime extension of the tools has been achieved.
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Sudhir Kumar, Pradeep Kumar, H.S. Shan
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セッションID: B-15
発行日: 2006/11/08
公開日: 2017/06/19
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This paper investigates the effect of process variables such as zircon flour, filler material (Siliminate) and binder (bentonite) on viscosity of slurry in Vacuum Assisted Evaporative Pattern Casting (VAEPC) process. In order to evaluate the effect of selected process variables, the Response Surface Methodology (RSM) has been used to correlate the independent process variables with the desired coating characteristics by a mathematical model. The central composite rotatable design was used to conduct the experiments. The result indicates that viscosity of the slurry increase with increase in zircon flour, siliminate and bentonite. The scanning electronic microscope (SEM) was used to analyze the morphology of the powder mixture containing zircon flour and filler material. X-ray analysis of the samples was done within the diffraction angle interval of 20 to 85°. Differentially Thermal Analysis (DTA) was also carried to measure the temperature effect on the samples.
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App13-
発行日: 2006/11/08
公開日: 2017/06/19
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Yasunori Harada
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セッションID: B-16
発行日: 2006/11/08
公開日: 2017/06/19
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In this work, caulking of a dissimilar material using shot peening was investigated. The availability of the plastic flow, i.e., the peening droop makes the joining of the dissimilar material possible. This method is similar to caulking. In the experiment, two kinds of shot peening machines, air type and centrifugal type, were employed. In order to examine experimentally the influence of working temperature on bondability, equipment with a heating furnace was produced. The influence of processing conditions on the joining of the dissimilar material and the substrate was examined. The bond strength was evaluated by tensile test. The dissimilar materials were successfully joined to the substrate by the peening droop. The bond strength increased with kinetic energy of shots and processing temperature. It was found that the present method using the peening droop was very effective for joining dissimilar materials.
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Shigeyoshi Haga, Yasunori Harada
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セッションID: B-17
発行日: 2006/11/08
公開日: 2017/06/19
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For the purpose of defining the alteration mechanism, we've selected normalized steel S55C that have a relatively similar %C to carburized-quenched steel that got the hardening treatment, and shot-peened the steel. In the experiment, martensite has been observed on the case of normalized steel S55C that was given shot-peening. According to the results of experiment, the conclusion we've reached about the alteration mechanism of the case of carburized-quenched steel caused by shot-peening is that shots thrown on the surface of steel generates frictional heat, which makes the temperature of the case reach the austenite region, and then the case transforms into martensite by self-cooling.
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Yusof H.A.M, Jauhari I, Rozali S, Hiroyuki O
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セッションID: B-18
発行日: 2006/11/08
公開日: 2017/06/19
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In this work, a further study on boronizing using compression method called superplastic boronizing (SPB) was conducted. Two types of duplex stainless steel (DSS) with different microstructure were boronized-the as-received and the superplastic fine grain DSS. The effect of surface roughness and powder particle size were studied. The microstructure, hardness, and layer thickness of the boronized materials were investigated depending on time, temperature and pressure. The results were then compared with the conventional boronizing (CB). The overall results from the study show that the compression method can significantly improve the surface properties of DSS as compared to the CB.
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Akin Malas
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セッションID: B-19
発行日: 2006/11/08
公開日: 2017/06/19
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Decarburisation may be commonly described as loss of carbon from the surface of ferrous materials. It is generally an undesirable material characteristic in the manufacturing industry. When components are hardened, decarburisation will reduce the surface hardness of the material and hence decrease its operational life under conditions of wear. This unwanted condition must therefore be eliminated from the heat treatment process. This paper summarises the causes of decarburisation in heat treatment and gives some troubleshooting tips for industrial practice, together with a case study.
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App14-
発行日: 2006/11/08
公開日: 2017/06/19
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O. Tongcher, N. Moonprasit, K. Suchiva, S. Thanawan
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セッションID: B-20
発行日: 2006/11/08
公開日: 2017/06/19
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Blend of natural rubber (NR) latex with chloroprene (CR) latex and acrylonitrile-butadiene (NBR) latex with various ratios were carried out in dispersion forms, and films from latex blends were prepared by spin coating technique. Morphology of the resulting films was examined using Atomic Force Microscopy. For NR/CR blend, phase imaging shows higher phase shift in NR than that in CR. In contrast, higher phase shift was found in the AFM images of NR/NBR blend film. Force distance curves apparently confirm relative higher stiffness, corresponding to higher phase shift. All blend films were readily well-distributed. Further phase morphology of the blend films in each ratio is discussed. Interestingly, it was observed that, at the ratios up to 50: 50 by weight of NR/CR and NR/NBR, NR remains in the dispersed phase, i.e. CR and NBR were the continuous phase, which is totally different from structural formation observed for conventional melt blending.
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Tawan Sooknoi, Attawit Aryuwat
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セッションID: B-21
発行日: 2006/11/08
公開日: 2017/06/19
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In this work, zeolite A membranes were prepared, using hydrothermal synthesis, on the surface of supports, which are the mixture of zeolite A and kaolin XRD and SEM revealed that the surface of supports were covered with polycrystalline zeolite A film having grain size of 2.5-5.0μm and have the pore size of〜0.4 nm. The zeolite A membranes were used for the separation of ethanol/water mixture in vapor phase. The experiment was carried out at 85^o℃, using 50-95% v/v ethanol as feed. The permeate was carried by Helium with flow rate 50-80 ml/min under atmospheric pressure and analyzed with on-line GC.
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Zarina Abdul Wahid, Rafindde Ramli, Andanastuti Muchtar, Abd Wahab Moh ...
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セッションID: B-22
発行日: 2006/11/08
公開日: 2017/06/19
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This study attempts to develop asymmetric ceramic membrane filter from nanosilica particles for ultrafiltration (UF) membrane. Alumina tubes were used as supports and these were coated with SiC to act as the intermediate layer. The UF membrane was developed using filtration technique through a chemical suspension of the particles. Nanosilica was suspended in HCl acid and was deposited on the alumina tube using a special coating assembly. The UF membrane was characterised for pore size, thickness, microstructure and topography. This study found that the use of nanoparticles for membrane development could easily control the pore size as well as the thickness of the membrane. The uniformity of the membrane thickness could also be achieved through this filtration technique.
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Ngamnit Wongcharoen, Thitinai Gaewdang, Pakorn Sittiketkorn, Nattaporn ...
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セッションID: B-23
発行日: 2006/11/08
公開日: 2017/06/19
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Na-doped CuInSe_2 (CIS) thin films were prepared by using sodium compounds such as Na_2S and Na_2S_2O_3 on glass slide substrate. The samples have been deposited in a two-stage process. In the first stage, the precursors were evaporated on glass slide substrate by thermal evaporation method in vacuum chamber. The selenization , named the second stage , was performed inside a partially closed graphite box at 550 C for 30 min in argon atmosphere with elemental Se incorporation. The obtained Na-doped CuInSe_2 thin films showed the chalcopyrite structure with predominant growth in the (112) orientation. The lattice parameters have been evaluated from XRD patterns. The optical and electrical properties of the obtained films were also investigated.
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App15-
発行日: 2006/11/08
公開日: 2017/06/19
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Masaaki Otsu, Hikaru Fukugawa, Kazuki Takashima
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セッションID: C-1
発行日: 2006/11/08
公開日: 2017/06/19
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In this study, borosilicate glass and single crystal silicon foils were bent by laser forming process. Single crystal silicon foils were formed at room temperature. Borosilicate glass foils were formed with elevating temperature to 280℃ by a resistance heater. Both materials were formed in air. Laser power, laser scanning velocity and defocus length were changed, and variation of bending angle was investigated. In the case of borosilicate glass foils, bending angle became maximum when the laser power was 12W and defocus length was 8mm. Bending angle was larger when scanning velocity was smaller. In the case of single crystal silicon foils, bending angle was maximum when laser power was 13W, scanning velocity was 15mm/s and defocus length was 5mm.
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Xia Zhu, Nagatoshi Okabe, Kazuki Mori, Manabu Takahashi, Tadashi Iura
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セッションID: C-2
発行日: 2006/11/08
公開日: 2017/06/19
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We have proposed a cold plastic working method, in which a partial diameter expansion part necessary to boss or gear stop can be formed on the thick walled pipe under multiple stress conditions combined cyclic torsional stress and axial-compressive stress. The diameter expansion deformation can progress easily with mechanical ratchet phenomenon generated by the alternate stress, using the method. In the present study, diameter expansion processing tests for the pipe were carried out under various processing conditions by using the new processing machine developed originally. Diameter expansion deformation behaviors on the processed part were measured continuously, and diameter expansion rates were calculated based on the deformation behavior. Furthermore, simulation analyses of the processing were done by finite element method (FEM). It is clarified experimentally and analytically that the diameter expansion deformation behaviors and the diameter expansion rate change according to processing conditions.
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Bunyong Rungroungdouyboon
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セッションID: C-3
発行日: 2006/11/08
公開日: 2017/06/19
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In this paper, the numerical model for the large thermoforming product has been developed by using the net radiation method with comprehensive view factor. The non uniform radiative heating of opaque thermoplastic sheet has been studied by using the newly developed numerical modeling.
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H.E.N. Bersee, S. Lindstedt, A. Beukers
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セッションID: C-4
発行日: 2006/11/08
公開日: 2017/06/19
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Cheng-Ho Li, Pei-Lum Tso
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セッションID: C-5
発行日: 2006/11/08
公開日: 2017/06/19
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In this paper, we intend to propose a theoretical model which helps us precisely planning the servo press ram motion for a drawing process, and than the ductile fracture in drawing is supposed to be prevented effectively. The model is based on two important formability limits, including blanking reduction ratio and Cockroft's ductile fracture criterion. Experiments are performed for validation. We apply a servo press to perform the copper material drawing process with the ram motion according to the proposed model, and investigations of fracture initiation and drawability are discussed. The results show that we could draw the parts deeper without ductile fracture by adopting the proposed model. The model is contributive in improving drawing process, further it could be introduced into the control system of servo presses to facilitate ram motion planning.
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App16-
発行日: 2006/11/08
公開日: 2017/06/19
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Sawad Sodamuk, Vichit Buakeaw, Suparerk Sirivadin, Suwat Jirathearanat
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セッションID: C-6
発行日: 2006/11/08
公開日: 2017/06/19
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The aim of this research is to study the effect of steel sheets produced by different manufacturers upon their forming limit. This work used forming limit diagram (FLD) to determine the formability of different trade marks steel sheets SPCC and SPCE, which have the same thickness of 0.8 mm. These two steel sheets are commonly used to produce automotive parts in Thai automotive industry. The circular marks were formed onto the surface of blank sheet using electro-etching technique. Subsequently, the blank sheet was continuously formed a hemispherical-dome shape by hydraulic press machine with a 100-mm punch. The pressing process was stopped when local necking and cracks were observed on the surface. The deformations of circular marks were accurately measured to obtain the percentages of major and minor strains. Afterward, this process was repeated again for different semi-dome's radii in order to produce FLD. The results were found that FLDs of SPCC and SPCE are slightly different. It has been found that SPCE has the .values of major and minor strains higher than SPCC. In other words, it indicates that SPCE has better formability than SPCC. The FLDs of both steel sheets have predicted failure in forming process consistent with the real experiment and finite element result.
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Thaweepat Buranathiti, Jian Cao
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セッションID: C-7
発行日: 2006/11/08
公開日: 2017/06/19
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Inverse analysis (IA) is a systematical means in determining an optimal blank configuration for a deep drawing process. In this paper, IA is explored by using a commercial finite element software package. A number of numerical studies on the effect of blank configurations to the part quality in a deep drawing process were conducted and compared. The quality of the drawing processes is numerically analyzed by using an incremental explicit nonlinear finite element code. The initial blank configuration has shown that it plays an important role in the quality of the product. However, it is observed that if the blank configuration is not greatly deviated from the one obtained from IA, the blank still can result a good product. In conclusion, IA has presented its important role in the systematical design process for deep drawing processes.
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Sutasn Thipprakmas
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セッションID: C-8
発行日: 2006/11/08
公開日: 2017/06/19
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In recent years, the reduction of environmental burden is necessary. In the application of deep drawing, in this research, we explored method for the realization of the reduction of the amount of lubricant used in order to resolve the above issue. Namely, the die was slotted to continuously applied lubricants on the drawn part. Furthermore, the optimization of the amount of lubricant used was also investigated. As a result of this study, it is concluded that the slotted die method is effectively in realizing reduction of the amount of lubricant used in deep drawing process for stainless steel material.
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Katsuhiro Maekawa, Mamoru Mita, Hirokazu Saito, Kazuhiko Yamasaki, Yor ...
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セッションID: C-9
発行日: 2006/11/08
公開日: 2017/06/19
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In this work, the feasibility of minute wiring by means of-ink jet printing with Ag NanoPaste^(R) and its laser sintering is investigated. Laser sintering twice in a row by scanning a pulsed Nd:YAG laser beam of 1.06μm wavelength and 0.1 mm spot diameter at average laser powers of 1.99 W and 4.45 W in air is most favorable. The Ag nano particles with around 5 nm in diameter stabilized by dispersant and organic solvent are melted to form coarse agglomerates of about 1μm on the Cu substrate. The agglomerates were identified as Ag, while a slight peak of Cu was observed, which means that solid phase diffusion occurs at the interface.
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Ryo Matsumoto, Hiroaki Kawashima, Kozo Osakada
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セッションID: C-10
発行日: 2006/11/08
公開日: 2017/06/19
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Frictional behaviour of magnesium alloy AZ31B (Mg-3%Al-1%Zn) is measured with the tapered plug penetration test under dry condition. The cemented tungsten carbide (WC) plugs are coated with diamond like carbon (DLC), TiA1N. The cylindrical hollow billets of AZ31B heated to the temperature of 200℃ are penetrated by the tapered plugs. DLC coating is effective in prevent AZ31B from adhering to the tool surface. To examine the deformation behaviour of the billet during the plug penetration test, the finite element simulation is carried out. From the simulation and experimental results, the coefficient of friction of AZ31B is estimated.
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p.
App17-
発行日: 2006/11/08
公開日: 2017/06/19
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Thotsaphon Threrujirapapong, Tachai Luangvaranunt, Sawai Danchaivijit, ...
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セッションID: C-11
発行日: 2006/11/08
公開日: 2017/06/19
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Al-Fe alloys with composition 1.0, 2.5, 5.0at.%Fe are fabricated by repeated compaction and backward extrusion in a closed die set using raw materials as elemental powder mixture. This process is done in solid state. The produced alloyed preforms are further consolidated by Hot Forging to achieve high density billet. Alloyed preforms are tested for thermal stability by using differential thermal analysis. Phase changes during heating are investigated by using x-ray diffraction, and confirmed by scanning electron microscope using EDS line scan mode. The alloyed billets are subjected to tensile test.
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Khan Ali Ahsan, Fathima Nachiar Bt. Anver Hussain, Fasli Maswani Bt. M ...
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セッションID: C-12
発行日: 2006/11/08
公開日: 2017/06/19
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In this work copper and brass electrodes have been compared in terms of wear characteristics and material removal rate during EDM (electrical discharge machining) of aluminum and stainless steel. It was found that a higher spark gap results more wear of the electrodes. It was found that volumetric wear ratio decreases with the increase in current during EDM. However, during machining of aluminum, volumetric wear ratio was found to be higher than that during machining of steel for both copper and brass electrodes. MRR (material removal rate) was found to increase with increase in current. Brass electrodes gave a higher MRR compared to copper electrodes and aluminum was removed faster than stainless steel.
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Muttamara Apiwat, Yasushi Fukuzawa, Naotake Mohri, Takayuki Tani
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セッションID: C-13
発行日: 2006/11/08
公開日: 2017/06/19
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As previously reported , several insulating ceramics such as Si_3N_4, SiC and ZrO_2 have successfully been machined by EDM. As unstable discharges occur during the machining of Al_2O_3 ceramics, inferior machining properties have been obtained as compared to other ceramics. In this study, semi-sintered graphite electrode and copper infiltrated graphite electrode were carried out on 95% of alumina. Graphite and graphite plus copper electrode improved machining rate.
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Norhamidi Muhamad, Che Hassan Che Harun, Murtadhahadi
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セッションID: C-14
発行日: 2006/11/08
公開日: 2017/06/19
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The paper report the optimisation study of the injection parameters for the feed stock consist of Stainless Steel powder (SS 316L and binder consist of Polyethylene glycol (PEG), Polymethyl methacrilate (PMMA) and Stearic Acid (SA) in Metal Injection Molding (MIM) process. Results from the study showed that the optimum injection parameters for the injection temperature, pressure at holding unit, injection pressure and molding temperature are between (130-140℃), (850-900 bar), (1000-1200 bar) and (30-40℃) respectively.
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R. Chotika, A. Punna, C. Shoosiri, N. Muenya, S. Amoranan, W. Kittinan ...
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セッションID: C-15
発行日: 2006/11/08
公開日: 2017/06/19
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Metal injection moulded stainless steel 316L tensile test specimens have been sintered using six different sintering conditions to study the effects of sintering temperature, sintering time and sintering atmosphere. Sintering at 1350℃ for 2 hours under argon provides the best mechanical properties.
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p.
App18-
発行日: 2006/11/08
公開日: 2017/06/19
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W. Likityingwara, P. Rungkiatnawin, N. Muenya, S. Amoranan, W. Kittina ...
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セッションID: C-16
発行日: 2006/11/08
公開日: 2017/06/19
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Stainless steel 630 with different mixtures of recycled and virgin feedstock have been injected, debinded and sintered under the same processing condition to study various physical properties. The results suggest that mixing recycled feedstock will not alter mechanical properties. However, the sintered part will be larger as more recycled feedstock has been introduced.
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Hideki Kyogoku
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セッションID: C-17
発行日: 2006/11/08
公開日: 2017/06/19
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We tried to fabricate Ti-Ni shape memory alloy using elemental Ti and Ni powders by metal injection molding (MIM). Gas-atomized Ti powder, TiH_2 powder and carbonyl Ni powder were used in this study. The use of fine TiH_2 powder results in improvement of sinterability of this alloy. The tensile strength and elongation of the as-sintered compacts of TiH_2 powder were more than 200 MPa and 3%, respectively. The deformation resistance of the compacts of Ti powder is fairly lower than that of the compacts of TiH_2 powder. The yielding stage became clear in the stress-strain curve of the alloy by performing shape memory treatment.
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Joel N. Dandal, Blessie A. Basilia
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セッションID: C-18
発行日: 2006/11/08
公開日: 2017/06/19
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This study aims to characterize and assess the nano-grained tungsten carbide (WC) as a tooling material for dejunk application in the semiconductor industry. Characterization techniques were employed to evaluate the following: a) mechanical properties (hardness and modulus of elasticity), b) microstructure and grain size, and c) material composition. Scanning Electron Microscopy (SEM) and Scanning Acoustic Tomography (SCAT) were used to check and assess the performance of the nano-grained WC compared with the existing coarse-grained WC used by the semiconductor industry. Results showed that the structure and grain size is a function of hardness and the material's ability to resist wear. The nano-grained WC has higher resistance to damage and no delamination was observed on the IC packages.
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C.H. Che-Haron, J.A. Ghani, Y. Burhanuddin
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セッションID: C-19
発行日: 2006/11/08
公開日: 2017/06/19
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The coated carbide cutting tools were used in dry cutting of D2 tool steel bar (60 HRc). Experiments were performed at various combinations of cutting speeds and feed rates. The results for hard turning operation showed that the flank wear increases with the cutting speed and feed rate. The flank wear occurs gradually at the beginning of machining and at the end of failure when VB_<max> reach 0.4 mm. The machined surface profiles with different cutting speed and feed rate were measured and the topography was observed using an electronic microscope. Tool life is inverse to cutting speed and feedrate The higher feed rate give the higher surface roughness The suitable cutting parameter values were determined for coated carbide tools when turning hardened tools steel.
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p.
App19-
発行日: 2006/11/08
公開日: 2017/06/19
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Hisashi Adachi, Shigeomi Koshimizu
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セッションID: C-20
発行日: 2006/11/08
公開日: 2017/06/19
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We investigated the amount of wear to cemented carbide tools by cutting a difficult-to-cut titanium alloy material (Ti-6Al-4V) using minimum quantity lubrication (MQL), and obtained results comparable to those using the conventional wet cutting processes. We also experimentally investigated tool coatings suitable for the MQL cutting of titanium alloys and found that the newly developed TiBON coating increases tool life, probably because it has a low coefficient of friction at high temperatures, and therefore provides improved lubricating properties that result in reduced adhesive wear.
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Shinji YOSHIHARA, Shuhei OSAKI
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セッションID: C-21
発行日: 2006/11/08
公開日: 2017/06/19
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Effect of Si particles on chipping characteristics of lead-free [1] AA6061 based aluminum alloys under two-dimensional cutting operations has been studied together with metallographic observations and fracture bending tests of chips. The addition above 2 mass% Si brought a generation of fine chips with a curled and saw-blade shape, leading to the enhanced machinability of the alloys. In the first stage of chipping process, Si particles in the alloys played a role in decreasing a friction coefficient on the rake surface of tool and also induced plastic instability in the chip due to serving the preferential void formation sites ahead of tool tip subjected to the mode I (tensile) stress state. In the secondary stage of the collision of chips against work, the curled and saw-blade shape chip was easily broken owing to the notch effect.
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Balwinder Singh, Pradeep Kumar, B.K. Mishra
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セッションID: C-22
発行日: 2006/11/08
公開日: 2017/06/19
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In this study, wax patterns with composition of 50% paraffin, 30% bees wax and 20% montan, are produced using wax injection machine. The optimal design for injection parameters is sought by using the design of experiment (DOE) and numerical analysis. Taguchi's approach has been applied for the optimization of wax injection parameters. The most influential parameters such as injection temperature, holding time, die temperature and injection time that will provide better and consistent dimensional accuracy to the wax patterns regardless of the noise factors present has been optimized. In order to determine optimal process parameters, experiments have been performed for various process conditions with the design of experiment (DOE) scheduling. Linear contraction of wax patterns was measured. Root Mean Square (RMS) values and dimensional variation were also determined.
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原稿種別: 付録等
p.
App20-
発行日: 2006/11/08
公開日: 2017/06/19
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Sirirat Rattanachan, Charussri Lorprayoon, Piyanan Bunpayun
原稿種別: 本文
セッションID: D-1
発行日: 2006/11/08
公開日: 2017/06/19
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Calcium phosphate cements were prepared by mixing many calcium phosphate combinations, aqueous solutions of chitosan and studied the effect of the concentration of chitosan on the mechanical strength and setting behavior of cements. Compressive strength and setting time of samples were determined. 5%wt chitosan in acetic acid with cement compositions gave higher the mechanical strength and faster the setting time of cements than aqueous solution. The formation of hydroxyapatite was found in the cements after curing in 100% humidity at 37℃ for a week.
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Deepa Ujjawal, Vikas Pruthi
原稿種別: 本文
セッションID: D-2
発行日: 2006/11/08
公開日: 2017/06/19
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The nature of biomaterial surface influences bacterial adhesion. Adherence of bacteria to biomaterials is the first stage in the development of a device related infection. The ability of bacterial cells to attach to biomaterial surfaces is dependent on the physico-chemical characteristics of the bacterial cell, the bacterial growth conditions and the biomaterial surface chemistry. In the present work an attempt was made to investigate the different growth media on the surface properties of bacteria isolated from indwelling urinary catheters and on their ability to adhere to polyurethane.The role of biomaterial conditioning film formation on the adherence of the isolates to polyurethane and on the polymer surface characteristics were also examined.
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Achariya RAKNGARM, Kousei OYAMA, Yoshiharu MUTOH
原稿種別: 本文
セッションID: D-3
発行日: 2006/11/08
公開日: 2017/06/19
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The cp-Ti and Ti-6Al-4V substrates were blasted with HAp and HAp/Ti mixed powders at room temperature using a wet blasting machine. The surface of substrate was found to be coated with HAp and HAp/Ti composite which was clearly showed HAp peaks from both XRD and EDS analysis. Anyhow, CaTiO_3 was occurred at low volume ratio of HAp in HAp/Ti mixed powder. The HAp attached tightly to the substrate, at least at the microscope level. It was stable against ultrasonic vibration for at least 5 min. The reaction between HAp and its substrate might be strong mechanochemical bonding which could produce a strong coating for biomedical application.
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Young-doo Kwon, Hyun-wook Kwon, Seung-wan Cho, Won-jae Yu
原稿種別: 本文
セッションID: D-4
発行日: 2006/11/08
公開日: 2017/06/19
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After scientific verification of osteointegration of dental implant, the overall efficiency of dental implant could be accepted. Nowadays, implants take part in a major trend of clinical coverage of edentulous mandible, and in the prosthetic maintenance equipment for partial edentulous mandible patient. For a successful maintenance of implant for a long term, careful mechanical considerations must be provided so that maximum stress in mandible resulted from the chewing force is maintained under the critical value. This study focuses on the reduction of maximum stresses in implanted mandible, especially in cortical bone. The stresses in implant and mandible are analyzed using the finite element packages, such as I-DEAS and NISA II/DISPLAY III using local zooming technique for concentrated stress analysis. We checked von-Mises stress and principle stress in mandible to find out best combination.
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Wichai Uthai, Kreunate Jittiporn, PongThanya Pongsuda, Aumnate Chuanch ...
原稿種別: 本文
セッションID: D-5
発行日: 2006/11/08
公開日: 2017/06/19
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Fermented food, especially fermented pork sausage(Nham), is widely consumed and normally served in the raw state as a condiment in Thailand. The hazardous pathogens that contaminated on raw fermented food might cause food born diseases. Therefore, this project was aimed to develop the biomaterial indicator that can notify the safe consumption condition of fermented pork products. This indicator was prepared by blending anthocyanin crude extracts with biopolymer containing amino functional groups. The desired smart indicator beads exhibited as pink at pH 4.0, violet at pH 4.5, and greenish blue at pH 5.0.
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原稿種別: 付録等
p.
App21-
発行日: 2006/11/08
公開日: 2017/06/19
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Ming YANG, Yuuri TANAKA, Hiromi SAITO
原稿種別: 本文
セッションID: D-6
発行日: 2006/11/08
公開日: 2017/06/19
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In this study, we developed a micro pump with dimension of several millimeters using micro metal forming in a progressive die. All of the parts were made of sheet metal and fabricated and assembled in the progressive die by the press forming. The results show that the micro pump by using metal forming has potential to be fabricated in much smaller size and lower cost in comparison with semiconductor process or other processes.
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Vituruch Goodwin, Buachum Udomsap, Oychai Tongcher
原稿種別: 本文
セッションID: D-7
発行日: 2006/11/08
公開日: 2017/06/19
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High petroleum price had a great impact on the nonoil producing countries like Thailand. In this work, an attempt was made to analyse the resistance to an oxidation process of various crude vegetable oils produced in Thailand with RANCIMAT instrument. The fatty acid compositions and the amount of natural antioxidants were directly related to the result of oxidation stability. An addition of commercial antioxidants increases both crude oil and its fatty acid methyl esters (FAME) or biodiesel oxidation stability. Crude palm oil (CPO) met the European oxidation stability standard (EN14112) which has set a minimum RANCIMAT Induction time of 6 h.
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Watcharapong Chookaew, Supasit Rodkwan, Nuchanat Na-Ranong, Chana Raks ...
原稿種別: 本文
セッションID: D-8
発行日: 2006/11/08
公開日: 2017/06/19
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One of common problems founded in the rubber compression moulding process is the shrinkage of rubber products leading to the loss of the shape of products. Therefore, this research presents an application of artificial neural network in prediction of the rubber product shrinkage in compression moulding. A back propagation neural network was developed to determine the shrinkage based on the variables of the rubber compound, processing variables like mould temperature and mould sizing variable. A two factorial design of experiment was carried out to obtain the significant variables before training the neural network. The results from the neural network prediction for the inside diameter shrinkage and the cross section diameter shrinkage indicate that architectures 5-11-21-1 and 5-11-16-1 provide a prediction within 95.9% and 96.1% accuracy, respectively.
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