Preprints of the National Meeting of JWS

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Preprints of the National Meeting of JWS

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Formulation of Guideline for FSW Applications to Joints for Hull Structures

Yuichi Saito, Hirofumi Takano, Yoshiya Yamaguchi, Tomomichi Shimizu

Session ID: 218
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.51.0

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Welding procedure for hull structure is to be approved following the Rules of the societies. However, technical basis of FSW was not developed in Japan. Then, we formulated FSW guideline to show requirements for conducting approval test and preparing WPS, considering technical requirement of FSW based on the Rule.

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Inclusion coarsening in friction stir welded Al alloy 2219

Yasuhiro Tamura, Yutaka Sato, Hiroyuki Kokawa, Hiroaki Sato, hiroki Ak ...

Session ID: 219
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.52.0

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Microstructure and properties in friction stir welded dissimilar heat-resistant steels

Peng Hua, Cunzhu Nie, Yutaka S Sato, Hiroyuki Kokawa, Seung Hwan C Par ...

Session ID: 220
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.53.0

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In this study microstructure and mechanical properties of the dissimilar heat-resistant steels welds by FSW were examined systematically.

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Friction sitr welding of oxide dispersion strengthened platinum alloy

Tomoaki Miyazawa, Yuichi Iwamoto, Tomohiro Maruko, Hidetoshi Fujii

Session ID: 221
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.54.0

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MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HIGH-STRENGTH PIPE STEEL FRICTION STIR WELDED USING VERY LOW ROTATIONAL SPEED

Sangchul Lee, Yutaka Sato, Hiroyuki Kokawa

Session ID: 222
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.55.0

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Microstructure and mechanical property of friction stir welded SUS329J4L

Masatomo Mori, Yutaka Sato, Hiroyuki Kokawa, Masanori Gokou, Shigeru H ...

Session ID: 223
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.56.0

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Interfacial microstructure and its mechanical property in friction stir welded A3003/SUS304 dissimilar lap joint using WC tool

Tomo Ogura, Yuichi Saito, Taichi Nishida, hidehito Nishida, Takumi Yos ...

Session ID: 224
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.57.0

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Evaluation of mechanical properties of FSW lap joint of A3003 and grooved SUS304

Taichi Nishida, Tomo Ogura, Hidehito Nishida, Takumi Yoshida, Noriko O ...

Session ID: 225
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.58.0

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Load reduction of thick plate welding by friction stir welding

Masashige OTA, Sunao TANAKA, Masaki KUMAGAI, Takeshi SAKUMA

Session ID: 226
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.59.0

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Effect of the Friction Stir Welding condition on the bead shape

sunao tanaka, toshihiko fukuda, masaki kumagai

Session ID: 227
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.60.0

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Effect of jointing conditions on mechanical properties of friction stir welded low carbon steel

Ryo Nishimoto, yoshiaki Morisada, tomoaki Miyazawa, Hidetoshi Fujii

Session ID: 228
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.61.0

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High-speed friction stir welding of steel plates with silicon nitride tool and back plate

Takeshi ISHIKAWA, Hidetoshi FUJII, Ai MASUDA, Shigeki MATSUOKA

Session ID: 229
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.62.0

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This report uses the welding tool and backing plate made of silicon nitride in friction stir welding of austenitic stainless steel. To be efficient use of frictional heat is generated, high-speed welding of 1m/min is possible. In addition, the joint efficiency is at least equal to that of base material. At the same time, the improvment of corrosion resistance was obtained.

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Life improvement of WC-Co tool using deformation control for friction stir welding of austenitic stainless steel

Ai Masuda, Kenji Okamura, Hidetoshi Fujii, Shigeki Matsuoka

Session ID: 230
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.63.0

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Effect of material flow by double-sided FSW on mechanical properties of Mg alloys

Juan Chen, Hidetoshi Fujii, Yufeng Sun, Yoshiaki Morisada, katsuyoshi ...

Session ID: 231
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.64.0

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The double-sided friction stir welding of magnesium alloys was investigated in this study. The results showed that the material flow during double-sided FSW was different from the one-sided FSW. After double-sided FSW, the effect of the material flow under different tools and welding parameters on microstructure, especially microtexture, and mechanical properties was evaluated.

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Three-dimensional visualization of material flow during FSW by X-ray radiography

Yoshiaki Morisada, Hidetoshi Fujii, Yosuke Kawahito, Kazuhiro Nakata, ...

Session ID: 232
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.65.0

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Process of joining between Aluminum alloy and PET by using friction stir heating

Ryosuke Ozaki, Yukio Miyashita, Farazia Binti Yusof, Nobushiro Seo, Yo ...

Session ID: 233
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.66.0

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Effect of process conditions on characteritics in Friction Stir Butt Welding of pure copper and copper alloy sheets

Shuhei Hiruta, Mitsuyuki Tanaka, Tomotake Hirata

Session ID: 234
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.67.0

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Effect of Material Flow on Formation of Weld Interface between Aluminum and Steel by Friction Stirring

Yoichiro Shimoda, Toshiaki Yasui, Masami Tsubaki, Masahiro Fukumoto

Session ID: 235
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.68.0

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Fast Computation of Residual Stress and Deformation by Idealized Explicit FEM Using Inherent Strain

KAZUKI IKUSHIMA, Shinsuke ITOH, Masakazu SHIBAHARA

Session ID: 236
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.69.0

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Residual Stress Analysis of Multi-pass Welding Using Idealized Explicit FEM with GPU

TAKASHI OKADA, KAZUKI IKUSHIMA, Masakazu SHIBAHARA, SATORU NISHIKAWA

Session ID: 237
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.70.0

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Thermal-elastic-plastic Analysis of Large-scale scale structure Using Tetrahedral Element

KAZUKI IKUSHIMA, TOSHIKI YAGI, Shinsuke ITOH, Masakazu SHIBAHARA

Session ID: 238
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.71.0

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A Proposal of Simulation Model by FEM of Laser-Arc Hybrid Welding

You-Chul KIM, Mikihito HIROHATA, Masaki MURAKAMI, Koutarou INOSE

Session ID: 239
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.72.0

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In simulating welding distortion and residual stress generated by laser-arc hybrid welding by thermal elastic-plastic analysis, how to treat the heat input is unknown. In this paper, the simulation model of laser-arc hybrid welding is proposed and its validity is verified.

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Three-dimensional Measurement of Welding Residual Stress of Coolant Pipe Joint in Nuclear Reactor Plant by Inherent Strain Method

Norifumi Kasahara, Akira Maekawa, Keisuke Aoki, Keiji Nakacho

Session ID: 240
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.73.0

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The welding residual stress of coolant pipe joint in nuclear plant is measured by the inherent strain method. In this study, the three-dimensional distribution is obtained, which includes circumferential remarkable change.

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Residual Stress Measurement on GTA Weld of A5083 Aluminum Alloy by X-ray diffraction

Akihiro Tsuji, Asahi Sugahara, Tadahumi Hashimoto, Shigetaka Okano, Ma ...

Session ID: 241
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.74.0

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We measured residual stress on weld of Aluminum alloy by X ray diffraction, and compered with results of thermo elastic plastic analysis and stress relaxation. These results showed good agreement, and we examined the applicability of X ray diffraction residual stress measurement.

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Study on X-ray Residual Stress Measurement in Low Steel Welds

asahi sugahara, shigetaka okano, tadafumi hashimoto, masahito mochizuk ...

Session ID: 242
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.75.0

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Improvement of Accuracy Estimated Welding Residual Stress of Reactor Vessel By Inherent Strain Method

Application of least squares method with cut

Keiji Nakacho, Yosuke Tanaka, Ryota Tamura, Naoki Ogawa

Session ID: 243
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.76.0

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The welding residual stress of the reactor vessel is measured by the inherent strain method.For the improvement of the accuracy of estimated residual stress, the least squares method with cut is applied.The data of measured strains are cut, depending on the residuals.

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Improvement of Residual Stress Measurement by Deep Hole Drilling Technique

Houichi KITANO, Shigetaka OKANO, Masahito MOCHIZUKI

Session ID: 244
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.77.0

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Twisting Deformation of Thin Plate Stiffened Structure under Welding

Jiangchao Wang, Masakazu Shibahara, Xudong Zhang, Hidekazu Murakawa

Session ID: 245
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.78.0

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To study the characteristic of the welding distortion in thin structures, experiments were conducted. The test model was a thin plate stiffened structure and a large twisting deformation was observed. The same structure was analyzed as a large deformation problem using a thermal elastic plastic FEM and a elastic FEM based on the concept of inherent deformation. The computed results by both methods showed the twisting deformation which is a typical buckling type deformation.

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Weld Residual Stress Analysis toward the Development of Structural Integrity Assessment Method for Structural Discontinuous Joints

Jinya Katsuyama, Kunio Onizawa

Session ID: 246
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.79.0

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Effect of Restraint Length on Residual Stress in High-Strength Weld Metal of Both-End-Fixed Joint Model

Noriyoshi KUBOTA, Yoshiki MIKAMI, Kazuo HIRAOKA, Masahito MOCHIZUKI

Session ID: 247
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.80.0

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Numerical Analysis of Hot Cracking in Welded Pipe Structure

MASAKAZU SHIBAHARA, TOMOYUKI DOBASHI, TAKUYA IWAMOTO, TAKAHIRO OSUKI, ...

Session ID: 248
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.81.0

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Removal process of drilling burr using arc discharge

Kazuomi Kusumoto, Yong Liu, Haruki Satou

Session ID: 249
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.82.0

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Removal process of milling burr using arc discharge This study describes the removal process in drilling burr of metals. Experiments have been carried out by varying processing parameters. From the removal amount and appearance of burrs, relationships between the processing parameters and removal quality were investigated.

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Removal process of milling burr using arc discharge

Kazuomi Kusumoto, Yong Liu, Yuya Torii

Session ID: 250
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.83.0

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This study describes the removal process in milling burr of metals. Experiments have been carried out by varying processing parameters. From the removal amount and appearance of burrs, relationships between the processing parameters and edge quality were investigated.

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Influence of assistance gas in laser cutting of mild steel plate, stainless steel, and aluminum

Hiroshi ASANO

Session ID: 251
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.84.0

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In the laser cutting of the board material, the worker has been selecting the assistance gas in proportion to the material. An oxygen cutting in the mild steel plate and a no oxidative scission in the stainless steel aluminum were compared and the influence on the cut process by the difference of the assistance gas was researched in the present study.

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Influence of right or wrong of laser cutting processing in board material of mild steel plate, stainless steel, and aluminum and thermal conductivities

Hiroshi ASANO

Session ID: 252
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.85.0

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The worker should decide processing conditions. When processing conditions are selected, the worker has been deciding it in consideration of various purposes. The influence of the thing and the thermal conductivity to ascertain right or wrong of cutting of the mild steel plate, the stainless steel, and aluminum with not the oxygen cutting in a general mild steel plate but high-pressure nitrogen was researched in the present study.

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Effect of distance of weld point on mechanical properties of multiple friction spot welded 5052 aluminum alloy joint

Yukihiro YOSHIKAWA, Kazuyoshi KATOH

Session ID: 301
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.86.0

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Mechanism of friction stir spot welding between aluminum alloy and pure titanium

Hiroki Tahara, Tosiaki Yasui, Masahiro Fukumoto

Session ID: 302
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.87.0

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Effect of crystal orientation on microstructure evolution in 304 stainless steel single crystal during FSSW

Jongjin Jeon, Sergey Minorov, Yutaka Sato, Hiroyuki Kokawa, Seunghwan ...

Session ID: 303
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.88.0

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Effect of probe insert depth on fracture mode of A5052 friction stir spot welded joint

Koji Yoshimura, Hiroshi Kawakami, Jippei Suzuki, Hitoshi Ozaki

Session ID: 304
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.89.0

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FSSW was performed to join A5052 sheets by the position control. FSSW process was changed from indirect stir to direct stir of a lower plate by the tool with different probe length, and change of microstructure and mechanical properties were investigated in this study.

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Application of a flat spot FSW to SPCC steel

Yufeng Sun, Hidetoshi Fujii

Session ID: 305
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.90.0

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A novel spot FSW technique was applied to high melting point material SPCC steel. Flat welds without keyhole can be obtained under suitable welding conditions. It revealed that the welds showed a transitional microstructure from ultra-fined microstructure in the upper plate and coarse grain structure in the lower plate. The Fe/Fe welds show high tensile strength and the effect of welding parameters on the mechanical properties were also investigated.

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Activation Spot Joining between Aluminum Alloy and Steel Sheet by Friction Surfacing

GORO WATANABE, YASUHIRO YOGO

Session ID: 306
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.91.0

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Spot joining between Al alloy sheet (Al) and steel sheet (Fe) by means of friction surfacing was studied. When joining, Al and Fe are rotated relatively with respect to the consumable rod of Al alloy while pressing the rod onto the Al at the overlapped part. At the same time, the rod metal forms a padding which compensates for the thickness at the joined part. As a result, relatively higher tensile shear strength of the joining was obtained.

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Effect of Welding parameters on Strength and Microstructure in Aluminum alloy / Zinc coated steel friction stir joining

Masaki Yamamoto, Tomo Ogura, Akio Hirose, Ryoji Ohashi, Mitsuo Fujimot ...

Session ID: 307
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.92.0

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We made aluminum alloy / zinc coated steel joint by friction stir joining. We selected tool rotation, tool pressure and welding time as welding parameters. The observation of the interface and fracture surface revealed that liquation cracking exists near the interface. The liquation cracking seemed to be caused by remaining zinc. It was found that the shear strength of the joint becomes higher when the more zinc was successfully discharged.

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Effect of friction stir processing on microstructure of laser clad cobalt based alloy

Yusuke Kitamura, Yoshiaki Morisada, Hidetoshi Fujii, Tadashi Mizuno, G ...

Session ID: 308
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.93.0

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Characteristic Changes of Flake Graphite Cast Iron by GTA Welding and Friction Stir Process

Keita HATAKEYAMA, Kiyoshi SHINODA, Toshiyuki HASEGAWA, Michinori OKUBO

Session ID: 309
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.94.0

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Effects of Tool Shape on Powder Dispersion during Friction Stir Powder Processing

Koichi Imagawa, Hidetoshi Fujii, Yoshiaki Morisada

Session ID: 310
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.95.0

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Investigation of tensile properties in friction stir zone of cast Al-alloy

Tetsuya Tagawa, Ken Ikawa, Yohei Katsuragi, Takeshi Shinoda, Fumiyoshi ...

Session ID: 311
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.96.0

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Joining of W-Cu composite materials using Ti-coated Ag-Cu filler materials

Koji Nosaki, Takuma Itohara, Yutaka Hiraoka, Hideaki Hanado, Koji Kama ...

Session ID: 312
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.97.0

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Previously, we reported joining of W-Cu composite materials by using Ag-Cu filler materials. In this study, we tried to join W-Cu composite materials by using Ag-Cu alloy which had been pre-coated with titanium. Then, joint strength was evaluated, and crack generation and propagation sites were examined.

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Effect of Spray Conditions on Co-Cr-Mo Coating Properties

Takayuki Kuwashima, Tetsuya Sonoda, Takashi Iimura, Keiji Ynagihara, A ...

Session ID: 313
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.98.0

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Co-Cr-Mo powder was sprayed by HVOF and Plasma Spraying in each spray conditions. And the effect of spray conditions for coating properties are studied. The micro vickers hardness sprayed by HVOF was higher than other sprayed coatings.

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Optimization of Slurry Parameters in Thermal Nanoparticles Spraying

Soshu Kirihara, Yasunori Uehara, Satoko Tasaki

Session ID: 314
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.99.0

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Effects of Metal Structure on Fatigue Characteristics

You-Chul Kim, Hidekazu Matsuoka, Gyu-Baek An

Session ID: 315
Published: 2011
Released on J-STAGE: November 09, 2011

DOIhttps://doi.org/10.14920/jwstaikai.2011f.0.100.0

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It is known that metal structure influences fatigue characteristics (fatigue strength and lifetime). In this paper, three kinds of steel, of which metal structure is different, were prepared and fatigue tests were carried out. It was investigated from the results of the experiment what kind of structure is effective for fatigue characteristics. The results are shown.

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