-
Shinichi Tashiro, Manabu Tanaka
Session ID: 302
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
In TIG arcs, since the current in the arc plasma is originated mainly from thermionic emission on the high temperature cathode surface, it is significantly important to know the temperature of the cathode surface to realize required properties of the arc plasma. In this presentation, the experimental results on the measurement of the cathode surface temperature of helium TIG arcs are discussed.
View full abstract
-
Fumihiko Tsukamoto, Katsuhiko Yasuda, Kazumasa Nishio
Session ID: 303
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
In the Programmed TIG welding, it is necessary to reproduce the arc length etc. correctly to reproduce the excellent welding that the welder does.
In this research, it paid attention to an excellent correction ability by welder's senses, and the welding process that the welder cooperated was examined in the Programmed TIG welding of the changed welded joint.
View full abstract
-
Development of Underwater Repair Welding for Spent Fuel Storage Pool (1st Report)
Kaoru Ooeda, Masahide Katou, Yasumitsu Hamada, Toshihiro Ootsuka, Seii ...
Session ID: 304
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
An underwater TIG welding technology with patch plate has been developed for the purpose of maintainance and repair of the spent fuel storage pool, and the fundmental research results are reported in this paper.
View full abstract
-
Development of Underwater Repair Welding for Spent Fuel Storage Pool (2nd Report)
Kaoru Ooeda, Masahide Katou, Yasumitsu Hamada, Toshihiro Ootsuka, Seii ...
Session ID: 305
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
This paper reports a new developed welding equipments and its practical application for underwater TIG welding with patch plate.
View full abstract
-
Yoshiki MIKAMI, Masahito MOCHIZUKI, Masao TOYODA
Session ID: 306
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The effect of heat input parameter on residual angular distortion and reduction by transformation expansion of weld metals was investigated by means of numerical simulation. The combinations of heat input Q and plate thickness h were varied to change the heat input parameter Q/h2.
View full abstract
-
keiji nakacho, hiromitsu hamaguchi, yusuke takeda
Session ID: 307
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The welding residual stresses of the pressure vessel of nuclear power plants are measured by inherent strain method. The distribution function of inherent strain is used to measure them practically and efficiently. The applicability is studied using the diagnosis of statistics.
View full abstract
-
You-Chul KIM, Jae-Yik Lee
Session ID: 308
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Shinsuke Itoh, Linjie Zhang, Masakazu Shibahara, Hisashi Serizawa, Hid ...
Session ID: 309
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The welding distortion of the pipe can be divided into the axial shrinkage, the translation and the inclination. The objective of this paper is to investigate the influence of various factors on the multi-pass welding distortion.
View full abstract
-
shigetaka okano, masahito mochizuki, masao toyoda, toshio ohnawa, tomo ...
Session ID: 310
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
It is desirable to control welding distortion , the procedure should be applied at the same time with welding rather than before or after welding for reduction in cost. The method suggested in this paper is to cool the hot section of weld metal during welding, in order to control rotational distortion. Root gap behavior during in-process welding by additional cooling is numerically analyzed by the three-dimensional thermal elastic-plastic analysis and experimentally investigated. In the result, under the proper condition in additional cooling, rotational distortion is expected to control without any tacking or restraint.
View full abstract
-
Yasutaka Ando, Shogo Tobe, Hirokazu Tahara
Session ID: 311
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
To diminish the peeling off and crack generation of Mo coating during diamond deposition by combustion flame method, Mo-Fe interlayer was introduced between Mo coating and substrate. Consequently, since the peeling off and crack generation could be diminished and thermal stress buffer effect of the interlayer was confirmed.
View full abstract
-
Yutaka Miyamoto, Kiyoyuki Fukui, Masato Uchihara, Takashi Imamura, Shi ...
Session ID: 312
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
We devised a conventional method and different mash seam welding.
We clarified a welding condition and relations with a bondability.
In addition, we investigated performance such as corrosion resistance after a formability
and the painting to clarify applicability to a tailored blank and compared it with other welding methods.
View full abstract
-
Kin-ichi Matsuyama
Session ID: 313
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
It is still problem how to decide or to make model of the initial contat resistance in the numerical simulation of resistance spot welding process. This report introduces a novel procedure and the system configuration to resolve this problem by using the hybrid simulation technique besed on monitoring data of welding current and welding voltage during welding.
View full abstract
-
YU-ICHI SAEKI, Mituru Nakamura, MASAYUKI AONUMA
Session ID: 314
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Influence of Aluminum on Friction Weldability between Pure Titaniums and AZ91D Type Magnesium Alloys.
View full abstract
-
Masahito SANEKATA, Kazuyoshi KATOH, Hiroshi TOKISUE
Session ID: 315
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Friction welding using some kind of aluminum alloys was the investigated for the welding of stud to plate. The rotational plane was observed to move on the welded layer of joints of stud to plate. The movement phenomenon of the rotational plane was investigated for stud to plate by friction welding.
View full abstract
-
Kounosuke Hirai, Hideyo Takeuchi, Tatsuo Kemmi, Takayuki Futatsuka, Ri ...
Session ID: 316
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
We developed a new one side tandem spot welding technology. In the former paper, the joint mechanism was clarified and the availability to the mild steel sheets was reported. This time, we mentioned what was investigated to apply this technology to high strength steel sheets and hot-dip galvanized steel sheets.
View full abstract
-
Akira Kobayashi, Shoji Yano
Session ID: 317
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The Fe-based metal glass coating were produced by gas tunnel type plasma spraying, and the microstructure and mechanical properties were investigated.
View full abstract
-
Akira Kobayashi, M. F Morks
Session ID: 318
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Fused silica (amorphous SiO2) is a good candidate to improve the mechanical properties of HA coatings. The presence of silica particles inside HA coatings improve the bonding strength among the HA particles and increase the abrasive wear resistance.
View full abstract
-
Kim Jung-Kyu, Shim Hee-Jin
Session ID: 319
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The brazing is a method of permanently joing a wide range of materials and has wide application in fabrication components of commercial value. It is distinguished from welding in taht the process takes a temperatures below the melting points of the materials to be joined and from soldering by the temperature of processing above method 450 degree. This method is commonly used in electronics or refrigerating machines due to tis advantage of diminution of heat influence and easy manufacturing.
Unfortunately, the brazing method for copper alloy used in household air contioner has some demerits that the copper allow is susceptible to heat and the resulting joints may have various flaws. Therefore deciding the optimal joint conditions is an effective method on the basis of the experimental data. However, using a trial-and-error method form the beginning is such a wide area, in order to decide the optimal conditions requires too many number of experience, to overcome these problems and to decide the optimal conditions a procedure using response surface methodology. The response surface emthod, consisting of experimental design, statistical modeling and optimization is used to decide the optimal joint parameter with process conditions.
View full abstract
-
Makoto TAKAHASHI, Kenji IKEUCHI
Session ID: 320
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Soldering of glass with application of a voltage between molten solder and glass was tried in order to enhance contact of solder to glass. In this process, effects of alloying elements of solder on strength and microstructure of glass/solder interface were investigated.
View full abstract
-
katsuhiko yoshihara, toshiyuki yokomae, katsumichi ueyanagi, tomoaki g ...
Session ID: 321
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
We had been made an experiment that effect on property of Ni-plating (Electrolytic/Electroless) for ability of welding. And we have fond that electroless plating has no spatter, and welding area is larger than applied electrolytic plating. These results are suspected of effect of melting temperatures of Ni-plating (Clystal/Amorphous).
View full abstract
-
Kenichi Hanazaki, Tomokatsu Aizawa, Keigo Okagawa
Session ID: 322
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
This paper describes a new welding technique for copper foils on flexible printed circuit boards and its experimental results. When an impulse current from a capacitor bank passes through a flat one-turn coil, a magnetic flux is suddenly generated in the coil. Eddy currents are induced in two insulated aluminum sheets and overlapped copper foils on the boards between the sheets placed in the coil. The foils have a gap between them. The foils can be welded both by the Joule heat generated in them and by the impact effect with pulsed magnetic pressure applied to them. The bank energy required for this
welding is about 1.0 kJ.
View full abstract
-
Yasunori Miki, Hiroshi Nishikawa, Tadashi Takemoto
Session ID: 323
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Zhan Jie Wang, Hirokazu USUKI, Hiroyuki KOKAWA
Session ID: 324
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Lanthanum strontium manganate (La0.7Sr0.3MnO3: LSMO) thin films were grown on SiO2/Si substrates by a metallo-organic decomposition method, and their crystalline structure, microstructure and electrical properties were investigated.
View full abstract
-
Yutaka Sato, Masahiro Muraguchi, Hiroyuki Kokawa
Session ID: 401
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Microstructure and properties of the weld using W-based alloy tool were examined. The tool was wore during FSW. The stir zone had many ferrite phases containing W. The stir zone has the higher mechanical properties than the base material. Corrosion resistance of the stir zone was acceptable.
View full abstract
-
Seunghwan Park, Satoshi Hirano
Session ID: 402
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Microstructures and mechanical properties were examined in friction stir welded ultra fine grained steel not containing Nb and Ti. The welding temperature during friction stir welding was measured to less than 1000 deg. C. This resulted in the fine duplex microstructure of ferrite and martensite in the stir zone. In the heat affected zone, the softened region due to frictional heating was not detected, which led to hardness distribution as same as base material and 100 % of joint efficiency.
View full abstract
-
Yoshiaki Morisada, Hidetoshi Fujii, Toru Nagaoka, Masao Fukusumi
Session ID: 403
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Fullerene was successfully dispersed into A5083 by Friction Stir Processing (FSP). Material flow during the FSP was investigated in respect to the dispersion of the fullerene. It was revealed that formation mechanism of "Onion ring" was tightly related with the convection flow induced by the shoulder of a rotating tool. the material flow by the shoulder is very important to fabricate the surface composites by the FSP with the uniform dispersion of the reinforcement.
View full abstract
-
Mahmoud Essam, Makoto TAKAHASHI, Kenji IKEUCHI
Session ID: 404
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Friction stir processing (FSP) has been applied to uniform dispersion of SiC particles in surface layer of AA1050 sheets to form surface composite for hardfacing. The effects of rotation and traverse speeds of the FSP tool on the distribution of the SiC particles and hardness of surface composite were studied.
View full abstract
-
Shun Hirose, Hidetoshi Fujii, Takuya Tumura, Kazuhiro Nakata, Kiyoshi ...
Session ID: 405
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
By using self reacting tool , we control the heat input in the FSW process in detail. The butt welded joint are formed under various condition by changing a relative rotational speed of the probe and the shoulder, and their mechanical properties are evaluated.
View full abstract
-
Kinya Aota, Makoto Takahashi, kenji Ikeuchi
Session ID: 406
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Spot friction stir welding of Aluminum to low carbon steel was studied. In this study rotating tool was push into only Aluminum in lap welding, and stired only Aluminum. Welding strength and the reaction layer of an interface will be reported.
View full abstract
-
Hayato MATSUMURA, Katashi MIYAGAWA, Masami TSUBAKI, Toshiaki YASUI, Ma ...
Session ID: 407
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
A hybrid structure with Al alloy and high tension steel is attracted attention to achieve a light weight and the high strength for vehicles. In this study, spot welding between Al-Mg alloy and high tension steel by friction stirring, and the strength and the microstructure of weld joints were investigated.
View full abstract
-
Tatsuhiro YOSHIKI, Michinori OKUBO, Daisuke IKADA, Hiroki FUNAHASHI
Session ID: 408
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Weldability of aluminumu alloy sheets for lap joints are researched. Joining Processes are friction stir welding and resistance spot welding.
In the friction stir welding, base metals are used Al-Mg and Al-Cu alloys. We are clarified the process parameters fot same kind joint and dissimilara joint.
In resistance spot welding, base metals are Al-Mg and Al-Mg-Si alloys. As a result, weldability are evaluated.
View full abstract
-
Ryoji Ohashi, Mitsuo Fujimoto, Rinsei Ikeda, Moriaki Ono
Session ID: 409
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Basic test of Friction Spot Joining on high strength steel sheets was done. In this report, joint strength and durability of Silicon nitride tool were investigated. And influence of coating on tool lifetime and joint property were verified.
View full abstract
-
Katashi MIYAGAWA, Hayato MATSUMURA, Masami TSUBAKI, Toshiaki YASUI, Ma ...
Session ID: 410
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
A hybrid structure with Al alloy and steel is attracted attention to achieve a light weight and the high strength for transportation vehicle. In this study, spot welding between Al-Mg alloy and a variety of coated steel were performed by friction stirring, and the strength and the microstructure of weld joints were investigated.
View full abstract
-
Motomichi Yamamoto, Adrian Gerlich, Thomas H. North, Kenji Shinozaki
Session ID: 411
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Liquid Penetration Induced (LPI) cracking during AZ91 friction stir spot welding is investigated. The mechanism and the key factors determining LPI cracking in Mg-alloy friction stir spot welds are proposed.
View full abstract
-
akihiro sato, takao ishikawa
Session ID: 412
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Masahiro FUKUMOTO, Masami TSUBAKI, Toshiaki YASUI, Katashi MIYAGAWA, H ...
Session ID: 413
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
A hybrid structure with Al alloy and steel is attracted attention to achieve a light weight and the high strength for transportation vehicle. In this study, temperature and vertical load at spot welding by friction stirring were measurement, and the microstructures of weld joints were investigated.
View full abstract
-
Hidetoshi Fujii, Ling Cui, Kazuhiro Nakata, Kiyoshi Nogi, Rinsei Ikeda ...
Session ID: 414
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
A high carbon steel, S70C, was successfully friction stir welded. By decreasing the welding temperature to below 723degC, a high strength joint was obtained because the martensite phase was not formed.
View full abstract
-
Takeshi ISHIKAWA, Hidetoshi FUJII, Shunichi IWAKI, Shigeki MATSUOKA, K ...
Session ID: 415
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The maximum welding speed of 1000mm/min for austenitic stainless steel was achieved. The tensile strength of the welded joints is equivalent to that of the base metal at the welding speeds up to 300 mm/min, approximately 85% of the base metals at 1000mm/min. An increase in welding speeds can improve the corrosion resistance.
View full abstract
-
YUKI SAWADA, Mituru Nakamura, Yutaka Sato
Session ID: 416
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Stacked FSW between Ductile Cast Irons and Stainless steels
View full abstract
-
A study on friction stir welding with heating (Report 3)
Yuuta Kaneko, Susumu Hioki, Takehiko Takahashi, Riichi Suzuki, Hiroyuk ...
Session ID: 417
Published: 2007
Released on J-STAGE: May 30, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
On the friction stir welding (FSW), pre-heating makes welding speed higher, as it makes weld materials more softened. In this study, FSW was done, pre-heated at 150 to 250 degrees Celsius. As the result, the welding speed up to 2000mm/min was got at 250 degrees Celsius.
View full abstract
