-
TSUKASA OKAZAKI
Session ID: 214
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Austenitic stainless steel welded joints usually show mechanically under-match properties. But, in an architectural structure, there is a case where over-match joint is requested. So, welding consumables with high strength is requested. This report is an examination of high strength flux cored wire for SUS304A in SSBA.
View full abstract
-
TSUKASA OKAZAKI
Session ID: 215
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
From the result of 1st report, it turned out that increasing ferrite content is effective for making weld metal high strength. In this report, relationship between chemical content and tensile properties of E308MoT is examined and proper chemical range of E308MoT for SUS304A joint is proposed.
View full abstract
-
Masanori Miyagi, Masato Michiuchi, Hiroyuki Kokawa, Zhan Jie Wang, Yut ...
Session ID: 216
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Grain boundary engineering was applied for 304L austenitic stainless steel and intergranular corrosion properties and the degree of connectivity of random boundaries were evaluated. The resulting steel indicated high resistance of intergranular corrosion and very low percolation probability of random boundary network.
View full abstract
-
NAOKI ISAYAMA, MASAHIRO KUSAKA, MASAAKI KIMURA
Session ID: 217
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
To use the coil spring that consisted of the ferromagnetic material and the superelastic alloy as a magnetic drive actuator, the superelastic behavior of the coil spring in the large deformation region was analyzed in the theory. The effect of the material property of both materials on superelastic behavior of the coil spring was discussed.
View full abstract
-
Keiichi Yamasaki, Toshio Terasaki
Session ID: 218
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The evaluation method of the creep strain generated by PWHT, which is the primary factor of the residual stress reduction was not established. Then, the study purpose is establishment of evaluation method of the creep strain which uses creep rate equation.
View full abstract
-
Hiroyuki Imamura, Toshio Tarasaki, Michiaki Fukuya
Session ID: 219
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
When the steel transformed martensite by quenching, a quenching crack occurs. One of the causes of quenching crack is transient stress. So, relations between cylinder size and stress distribution were examined by FEM and examination.
View full abstract
-
Akira Andou, Toshio Terasaki, Takaharu Fujikawa
Session ID: 220
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Welding deformation and residual stress which are produced by multi-pass weld cause reduction in machining accuracy and strength of welded structures. Phenomena caused by multi-pass weld are based on those caused by two-pass weld. In this study, the feature of welding deformation produced by two-pass weld is presented.
View full abstract
-
Yoshiki Mikami, Masaya Nakamura, Masahito Mochizuki, Masao Toyoda
Session ID: 221
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Fillet welded T-joints were fabricated with the low-transformation-temperature welding wire under conditions that the generation of the angular distortion was prevented by clamps or rib-plates. Results of numerical simulation showed that the transformation expansion of the weld metal was effective for reducing the angular distortion even under the condition where external restraints exist.
View full abstract
-
HISASHI SERIZAWA, TAKAO YAMAMOTO, WEI LIANG, HIDEKAZU MURAKAWA, TOMOYU ...
Session ID: 222
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The inherent deformations of the simple aluminum alloy joints were estimated through the inverse analysis and the welding distortion of a part of the practical motorcycle was predicted using those inherent deformations.
View full abstract
-
Kazunori MATSUSHITA, Shigetaka OKANO, Masahito MOCHIZUKI, Masao TOYODA ...
Session ID: 223
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
There is a case in which welding deformation quantity differs, even if the welding heat input is equal. The welding experiment that changed welding current, arc voltage and welding speed was conducted, and relation between welding heat input and welding distortion was clarified. And it is clarified that welding distortion is not always evaluated in welding heat input.
View full abstract
-
shigetaka okano, kazunori matsushita, masahito mochizuki, masao toyoda
Session ID: 224
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Numerical analysis is done to study on effect of welding speed on evaluation of welding distortion by welding heat input. It is clarified that angular distortion, caused by inhomogeneous distribution of residual inherent strain, is not always evaluated by only welding heat input and influenced by characteristics of temperature distribution during welding.
View full abstract
-
Yusuke TAJIMA, Shinsuke ITOH, Sherif RASHED, Hisashi SERIZAWA, Hidekaz ...
Session ID: 225
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Thin plates often buckle after welding stiffeners to the plates. To avoid this, it is necessary to accurately predict welding residual stress and develop welding procedures that minimize it. The objective of the reported work is to investigate welding procedures to find out that which minimizes residual stress to avoid plate buckling. It is found that intermittent welding is effective in preventing plate buckling.
View full abstract
-
You-Chul Kim, Jae-Yik Lee
Session ID: 226
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Jae-Yik Lee, Kotaro INOSE, You-Chul Kim
Session ID: 227
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
-
SHINJI TAKABA, OSAMU YASUDA, Hitoshi Kaziwara
Session ID: 228
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Fatigue Cracks which occurred just under shoe support in the transverse beam of steel pier for bridge are reported. TIG weld for repairing after cutting out of cracks shall be proceeded as a process of structural reinforcement project under traffic. Mesurement of vibration of weldment which have fatigue cracks have been carried out. Opening displacement of root gap have been mesured. Critical opening displacement against hot crack shall be compred with site data and judged about sound welding under traffic.
View full abstract
-
Hee Joon Sung, Yeon Baeg Goo, Kyeong Ju Kim, Dae Soon Kim, Kenji Ikeuc ...
Session ID: 229
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
EGW is used for vertical position of ship fabrication. Welding Heat input of EGW is completely different with base plate thickness. To decrease heat input, FCAW + EGW combination process are applied. FCAW took high heat input made by EGW. Impact properties of FCAW weld was investigated.
View full abstract
-
Effect of strength matching on ductile fracture behavior on X80 girth weld joints (Report 3)
HIROYUKI MOTOHASHI, KAZUE MURAI, HIROSHI YATABE
Session ID: 230
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The critical condition to initiate ductile crack of girth welded joint in X80 linepipe was clarified by conducting 3 point bending CTOD tests and wide plate tensile tests. In addition, the effects of types of strength matching on ductile crack initiation were evaluated using finite element analyses.
View full abstract
-
KAZUE MURAI, HIROYUKI MOTOHASHI, HIROSHI YATABE
Session ID: 231
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Drop-weight tear tests, Drop-wear tear tests with nonflattned specimens, and Charpy impact tests were conducted on various small diameter line pipes. Based on these results, the toughness correlation between shear-area transition temperature for DWTT specimens and for Charpy specimens was clarified.
View full abstract
-
Sergery Mironov, Yutaka Sato, Hiroyuki Kokawa
Session ID: 301
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
High-resolution electron back scatter diffraction (EBSD) has been applied to study development of grain structure during FSW of pure iron. Microstructural evolution is shown to be a complex process driven by grain subdivision and finally leading to significant grain refinement. Material in stir zone is found to have strong ideal simple shear texture components.
View full abstract
-
Makoto TAKAHASHI, Hiroyuki WATANABE, Kenji IKEUCHI
Session ID: 302
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Mechanical mixing of elements from steel into aluminum alloy contributes to formation of intermetallc compounds at friction-welded aluminum alloy / steel interface. Microstructure and strength of FW joints of steels of different hardness to aluminum alloy were compared.
View full abstract
-
Yutaka Sato, Hideaki Yamanoi, Kunitaka Masaki, Hiroyuki Kokawa, Tadash ...
Session ID: 303
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Ultrahigh carbon steel having 1.0wt% C was friction stir welded after thermal processing for grain refinement. FSW produced the martenisitic structure in the stir zone, which caused the significant increase in hardness. Microstructural evolution of the weld could be reasonably explained using Fe-C phase diagram.
View full abstract
-
Masahiro Muraguchi, Yutaka Sato, Hiroyuki Kokawa
Session ID: 304
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Microstructure and properties of 304 stainless steel friction stir welded by WC tool were examined. The WC tool drastically wore during friction stir welding. Microstructure sensitive for etching was formed in the stir zone. The weld had the higher mechanical properties than the stir zone, but the corrosion resistance is very reduced.
View full abstract
-
Yu Zhang, Yutaka Sato, Hiroyuki Kokawa, Seung Hwan Park, Satoshi Hiran ...
Session ID: 305
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Friction stir welding was applied to commercial purity Ti using PCBN tool, and then its microstructure was examined. The PCBN tool severely wore during friction stir welding of Ti. The vicinity of top surface of the stir zone has a large amount of PCBN debris and rod-shaped precipitates which was speculated as the Ti borides.
View full abstract
-
Seunghwan Park, Satoshi Hirano, Takeshi Tsukamoto
Session ID: 306
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The microstructure and mechanical properties were examined in friction stir welded Zr-base metallic glass. Any crystalline was not formed in the stir zone, which resulted in no increase in hardness in the stir zone. Tensile test specimens were fractured in the stir zone due to defects. The tensile strength was about 40 % of base material.
View full abstract
-
Kenji SHINOZAKI, T.H. North, Motomichi YAMAMOTO, A. Gerlich, Shohei HO ...
Session ID: 307
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
This paper examined cracking during dissimilar friction stir spot welding of Mg-alloy AZ91 and AM60.
View full abstract
-
Kunitaka Masaki, Yutaka Sato, Hiroyuki Kokawa, Masakatsu Maeda
Session ID: 308
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Microstructure in the stir zone of AA1100 was experimentally simulated under the same thermal hysteresis by plane strain compression test. The microstructure similar to one of the stir zone could be produced by plane strain compression test at strain rate of about 2s-1.
View full abstract
-
shun hirose, hidetoshi Fuzii, takuya tsumura, kazuhiro nakata, kiyosi ...
Session ID: 309
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The effect of heat input on the microstructures and mechanical properties of joints was investigated under various conditions by changing rotation speeds of the probe and shoulder for the self-reacting tool.
View full abstract
-
Hidetoshi Fujii, Takahiro Tatsuno, Takuya Tsumura, Manabu Tanaka, Kazu ...
Session ID: 310
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
A carbon steel was welded using a laser assited friction stir welding. It was found that the laser enables the welding speed to be increased. However, the microstructure is independent of the usage of the laser.
View full abstract
-
Masahiro ASANO, Kazuyoshi KATOH
Session ID: 311
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The effects of processing conditions on microstructures and mechanical properties by friction stir processing with 7075 aluminum alloy sheet of 5mm in thickness was examined.
View full abstract
-
YUKI SAWADA, Mituru Nakamura, Yutaka Sato
Session ID: 312
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Influence of Preheating Temperature for Stacked FSW between Ductile Cast Irons and Stainless steels.
View full abstract
-
Masaya KUWAHARA, Masahiro HUKUMOTO, Toshiaki YASUI, Masami TUBAKI
Session ID: 313
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Weld joint between aluminum and steel by friction stirring is examined for automobile manufacturing. In consideration of automobile recycling, method of separation between aluminum and steel for the joint has to be established. In this research, the method of separation for the joint by heating was studied.
View full abstract
-
Tatsuhiro YOSHIKI, Michinori OKUBO
Session ID: 314
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Weldability of Al-4.0%Cu and Al-0.63%Si-1.0%Mg alloy sheets researched.
Joining processes is friction stir welding.
This research are clarified that process parameters are selected for joints.
View full abstract
-
Keisuke Okamoto, Jippei Suzuki, Hiroshi Kawakami
Session ID: 315
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The force and contact speed of the percussion welding are changed individually in order to clarify those influences on the joint strength and the discharge time. The force scarcely affects the joint strength. To obtain the high strength joint, the contact speed of 0.2 m/s is optimum, while the discharge time is about 5 ms.
View full abstract
-
Daisuke UTSUMI, Masahiro KUSAKA, Masaaki KIMURA
Session ID: 316
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Effect of groove thickness on joining phenomena and tensile strength of medium carbon steel joint by autocompleting friction welding method was investigated. The ratio of circumferential shear fracture was proposed, which was calculated by a transfer torque of insert piece with dependence of a thickness and the initial torque with dependence on the friction welding condition. When the value of that ratio was larger than 1, the insert piece had produced the circumferential shear fracture, and the friction welding had automatically finished. The joint had the tensile strength as the base metal.
View full abstract
-
Haruo INOUE, Masahiro KUSAKA, Masaaki KIMURA
Session ID: 317
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
This paper describes about analysis method of friction torque and welded interface temperature during first phase in friction welds. The friction torque until the initial peak was divided into two stages, i.e., the wear and seizure stages. Friction torque and the welded interface temperature were calculated by FEM analysis code ANSYS. In actual calculation, a friction heat, heat transfer and structural analyses were coupled with any time. The calculated friction torque curve was in approximate agreement with the experimental curve.
View full abstract
-
Kenta KASUYA, Masahiro KUSAKA, Masaaki KIMURA
Session ID: 318
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Effect of friction welding condition on tensile strength of brass/low carbon steel joint was investigated. The tensile strength increased with increasing friction time. The joint had the tensile strength as the brass base metal, and it fractured at the brass base metal when the friction welding conditions was as follows: a friction time of 3.8s and a friction pressure of 30MPa, or a friction time of 1.5s and a friction pressure of 90MPa.
View full abstract
-
YU-ICHI SAEKI, Mitsuru Nakamura, MASAYUKI AONUMA
Session ID: 319
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Influence of Interface Reaction Phase on Mechanical Strength between Pure Titaniums and Magnesium Alloys using Friction Welding Method.
View full abstract
-
Masayosi Hasegawa, yousuke Yamaguti
Session ID: 320
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
We tried friction welding to jointing a polyethylene pipe for gas and water pipe.A method established in a conventional study was a method to perform friction welding after having preheated it by a hot plate to prevent of polyethylene dust by friction welding, but it needed time for preheat and temperature management is difficult, in this study devised a method to prevent of polyethylene dust without preheating.
View full abstract
-
Kenichi Hanazaki, Junichiro Tokutomi, Tomokatsu Aizawa, Keigo Okagawa
Session ID: 321
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
A lot of solders are used by the joining of Flexible Flat Cable (FPC). However, the high speed bonding without using solder is required for reduction of emission. In this study, lap joining of FPC is achieved by magnetic pressure welding. A complete weld can be observed by microscope without an insulating layer of FPC melt.
View full abstract
-
Yuushi Suzuki, Takehiko Watanabe, Atsushi Yanagisawa, Teppei Satou
Session ID: 322
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
To reduce the weight of vehicles, the technology to join magnesium to iron is necessary. Resistance spot welding is widely employed in the automotive industry, because its process can be automated and finish in a short time. In this report, we investigated resistance spot welding of mild steel to magnesium alloy.
View full abstract
-
Toshio Kuroda, Kenji Ikeuchi, Masahiro Shimada, Hisamichi Kimura, Akih ...
Session ID: 323
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
To make thick metallic glass sheet, the resistance welding of Zr-based metallic glass sheets were carried out. Overlapped 4 metallic glass sheets were put between stainless steels electrodes, and resistance welding was done. There is no visible defect or pore at interface. The welding of the metallic glass was successful.
View full abstract
-
Kazuya Okamura, Jippei Suzuki, Hirosi Kawakami
Session ID: 324
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
In general, the set values of welding current and electrode force are used to express the boundary condition of spattering. The value of force varies during welding due to thermal expansion. Therefore, the boundary condition is influenced by the method of applying force of the welder.
View full abstract
-
TETSUYA FUJIMOTO, MASAMI MATSUBARA
Session ID: 325
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
The projection welding of the gear which was carburized can't do the good welding with carburized distortion. In this research, good welding was enabled by using the jig which corrected a distortion.
View full abstract
-
Du-Youl Choi, Masahito Mochizuki, Masao Toyoda
Session ID: 326
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Numerical simulation of resistance spot welding process for automotive high strengh steel has been performed in this study.
The effect of various welding parameters on the negget formation process was investigated by FE analysis.
View full abstract
-
Shinji Fukumoto, Taiju Matsuo, Daisuke Kuroda, Atsushi Yamamoto
Session ID: 327
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Weldability of nickel free stainless steel for medical devices by small-scale resistance spot welding was investigated. Sound joints were obtained and the heat affected zone was limited. Weld nugget included two phases, that is, austenite and a little bit of delta-ferrite.
View full abstract
-
Shigeru Morikawa, Shinji Fukumoto, Atushi Yamamoto
Session ID: 328
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
As TiNi alloy with various characteristics is often used for medical devices, micro-scale resistance welding seems to be favorable. Therefore, micro-scale resistance welding was applied to crossed TiNi fine wires, and the microstructure and welding mechanism are examined. The wires were welded in solid state with initial transient liquid phase.
View full abstract
-
Hitomi Nishibata, Manabu Fukumoto, Masato Uchihara
Session ID: 329
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
To clarify the feature and problem of one side spot welding, influencing factor on nugget formation was investigated by experiment and CAE.
With less rigidity of component, it was difficult to concentrate current. It suggested that rigidity is necessary to obtain stable weld-nugget.
View full abstract
-
Tomokatsu Aizawa, Keigo Okagawa, Mehrdad Kashani
Session ID: 330
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
High density magnetic flux is suddenly applied to aluminum sheets which were put on both sides of a insulation sheet with a hole. The aluminum sheets cab be welded by magnetic pressure at the hole. This welding method and experimental results are reported. Multi-spot welding is possible by increasing the number of holes.
View full abstract
-
Takeshi Tsukamoto, Hirotsugu Kawanaka
Session ID: 331
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Fundamental characteristics of dissimilar joints of Fe alloys with copper, Ti alloy and Al alloy made by pulsed electric current bonding have been investigated. Typical features of those dissimilar joints, and correlations between bonding conditions and joint properties will be reported.
View full abstract
-
Yukiko Abe, Takehiko Wanabe, Atsushi Yanagisawa, Manabu Abe
Session ID: 332
Published: 2007
Released on J-STAGE: October 23, 2007
CONFERENCE PROCEEDINGS
FREE ACCESS
Authors tried to use a rotating step-shape probe in butt joining of steel to magnesium alloy, and compared the joint property using the step-shape probe with that using a pillar-shape probe. The joint efficiency by using the step-shape probe was increased.
View full abstract
