Preprints of the National Meeting of JWS

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Preprints of the National Meeting of JWS

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The effect of paint baking cycles on the spot weld strength of advanced high strength steel

Toru Okada, Masato Uchihara, Kiyoyuki Fukui, Sullivan Smith, Nick den ...

Session ID: 101
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.101.0

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Resistance spot welding and its joint performance of magnesium alloy sheets

Genichiro Murakami, Ranfeng Qiu, Yukitaka Matsumoto, Shinobu Satonaka, ...

Session ID: 102
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.102.0

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Microstructure for Weld Joint of Super Duplex Stainless Steel using Resistance Butt Welding

Toshio Kuroda, Kenji Ikeuchi, Akira Kobayashi, Makoto Takahashi, Masah ...

Session ID: 103
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.103.0

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Microstructure for resistance butt welding of super duplex stainless steel was investigated by means of transmission electron microscopy. The upset pressure and the welding time were changed and the resistance welding of super duplex stainless was done. As pressure and welding time increased, the absorbed energy was increased. The bonding interface was observed by TEM. As the pressure was increased, the oxide film was moving and new surface was welded.

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Comparison among a few types of steel for spattering condition of spot resistant welding

IBRAHIM ISHAK, JIPPEI SUZUKI, HIROSHI KAWAKAMI, HITOSHI OZAKI

Session ID: 104
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.104.0

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Three types of steel were studied on boundary condition for spattering by using two pressurizing methods (air pressurizing by cylinder and mechanical pressurizing by screw). Spattering condition is decided by welding current, electrode force and steel types. Experimental results were considered from viewpoint of energy input until spattering.

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Influence of plate thickness on the boundary condition for spattering in the resistance spot welding for steels

Atsushi Hisamatsu, Jippei Suzuki, Hiroshi Kawakami, Hitoshi Ozaki

Session ID: 105
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.105.0

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Three combinations of plate thickness on steel boundary condition is studied for spattering by using two pressurizing methods (air pressurizing by cylinder and mechanical pressurizing by screw). Spatter occurring time is prolonged with increasing the thickness of two plates.

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Ultrasonic measurement of spot welds base on acoustic properties in nugget

Masafumi Ueno, Masayuki Fujita, Chihiro Iwamoto, Shinobu Satonaka

Session ID: 106
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.106.0

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Analytical Study on Effect of Work-Hardening Property of Weld Metal on Fracture Performance of Welded Joints of 980 MPa Strength Class Steel

Yasuhito TAKASHIMA, Mitsuru OHATA, Fumiyoshi MINAMI

Session ID: 107
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.107.0

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In this work, the stress fields of welded joints of 980 MPa strength class steel with low yield stress weld metal was analyzed. The effect of work-hardening property of weld metal and strength mismatch in welds on fracture performance of the welded joints was discussed.

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Evaluation of Ductile Properties of Two-Phase Structural Steel by Damage Simulation

Midori SUZUKI, Anna UI, Mitsuru OHATA, Fumiyoshi MINAMI

Session ID: 108
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.108.0

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Simulation method that enables to predict the effect of micro-structural morphology in two-phase steel on ductile resistance is proposed. The dependence of ductile resistance on stress triaxiality during the straining, which is influenced by morphology of two phases, is analyzed.

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Simulation of the Effect of Material Properties on Ductile Crack Growth Resistance

Mitsuru Ohata, Takuya Fukahori, Ryo Yamaguchi, Yoichi Kayamori, Takehi ...

Session ID: 109
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.109.0

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The proposed damage model for numerically simulating ductile crack growth resistance curve (CTOD-R curve) taking two "ductile properties" of steel into account was found to predicted successfully the CTOD-R curve of high strength steel.

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Evaluation of Strength Mismatch Effect on Charpy and CTOD Fracture Toughness of Multi-Pass Weld HAZ of Structural Steel

Kyosuke MIYASHIRO, Mitsuru OHATA, Yasutake CHIBA, Keiji MURAYAMA, Fumi ...

Session ID: 110
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.110.0

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The multi-pass HAZ toughness of matched and overmatched joints is examined by Charpy impact and CTOD toughness tests at wide range of temperature. CTOD test results significantly exhibit strength mismatch effect compared to Charpy impact test results.

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Effect of oxygen on toughness in high strength weld metal

shuichi nakamura, toshiei hasegawa, isamu kimoto, ryuuichi shimura

Session ID: 111
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.111.0

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Study on Fracture Toughness of Heavy-Thick-Steel Plates by Center Notched Small Specimen

Yajima Yajima, Eiichi Watanabe, Takashi Nogami, Kousuke Yoshimoto, Tad ...

Session ID: 112
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.112.0

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Study on Fracture Toughness of Welded Joints for Heavy-Thick-Steel Plates by Center Notched Small Specimen

Hiroshi Yajima, Eiichi Watanabe, Takashi Nogami, Kousuke Yoshimoto, Ta ...

Session ID: 113
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.113.0

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Presumption of ductility cracking point that uses A.C. potential method.

Shigeaki Sugimoto, Nobuyuki Ishikawa, Satoshi Igi, Shingo Matukawa

Session ID: 114
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.114.0

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Evaluation of ductile crack initiation limit of CWP test using AC potential method

SATOSHI IGI, NOBUYUKI ISHIKAWA, SHIGEAKI SUGIMOTO

Session ID: 115
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.115.0

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Ductile fracture behavior of high strength linepipe steel is evaluated by the CWP (Curved Wide Plate) test. Crack initiation from the EDM notch prepared in circumferential girth weld is measured by the AC (alternating-current) potential method. And it is compared with experimental and finite elemet analysis result such as a crack tip opening displacement.

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Calculation of Stress Intensity Factor for Embedded and Surface Cracks by Applying Slice Synthesis Methodology

Yukinobu NAGATA, Koji GOTOH

Session ID: 116
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.116.0

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Slice Synthesis Methodology is one of the useful and practical method to calculate stress intensity factor for embedded and surface cracks. However, the accuracy of stress intensty factors by applying this method decreases in the case that crack edge reaches back surface of plate because slice synthesis methodlogy is established under cracks exist in infinite bodies. We will present the developed slice synthesis methodology for cracks in finite bodies.

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Precipitation phenomena in friction stir weld of automotive Al alloy 6016

Natsumi Abe, Uceu Suhuddin, Yutaka Sato, Hiroyuki Kokawa

Session ID: 117
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.117.0

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Study of FSJ joint performance on 5000 series aluminum alloys

DAISUKE WATANABE, MITSUO FUJIMOTO

Session ID: 118
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.118.0

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Texture analysis of single crystal pure aluminum friction stir spot welded

Toshiya Shibayanagi, Keizo Kashihara, Adrian Gerlich, Thomas H. North

Session ID: 119
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.119.0

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Deformability at high temperature of Al alloy including friction stir welding

masaki seno, Shinji Hukumoto, Atushi Yamamoto

Session ID: 120
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.120.0

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Friction stir welding has been developed as the joining method for aluminum alloys. Only limited works have been carried out on the effect of FSW joint on the deformability at high temperature. In this study, the blow formability of aluminum with a FSW joint was investigated.

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Influence of thermal properties of aluminum on bondability in dissimilar friction stir welded joints of steel and aluminum

TOMOTAKE HIRATA, TSUTOMU TANAKA, TAIKI MORISHIGE

Session ID: 121
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.121.0

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Fatigue behaviors of aluminum alloy/steel composite by friction stirring

Masaki OKANE, Yuichiro TAKAMI, Katashi MIYAGAWA, Toshiaki YASUI, Masah ...

Session ID: 122
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.122.0

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Effect of Welding Condition to Heat Input on Spot Welding between Aluminum Alloy and Mild Steel by Friction Stirring

Keitaro MIYAGAWA, Masahiro FUKUMOTO, Toshiaki YASUI, Masami TSUBAKI

Session ID: 123
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.123.0

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In friction stir welding, weld interface temperature influences generated intermetalic compound. In this study, that temperature was calculated by calculation value of heat input and measured value. And friction coefficient as influencing factor of heat input is considered.

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Parameter effect on strength in dissimilar friction bit joint of aluminum alloy and steel

Ting Huang, Yutaka Sato, Hiroyuki Kokawa, Michael Miles, Kohkonen Kent ...

Session ID: 124
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.124.0

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Dissimilar Metal Joining of Aluminum Alloys to Steel in the FSW by usuing Hot-dip Aluminized Steel Sheet

Tshuyoshi Matsumoto, Tetsu Iwase, Seiji Sasabe, Yasunori Hattori, Tada ...

Session ID: 125
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.125.0

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LIQUATION PHENOMENON DURING FRICTION STIR LAP WELDING OF AL AND MG DISSIMILAR ALLOYS

Yingchun Chen, Kazuhiro Nakata

Session ID: 126
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.126.0

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A dissimilar friction stir lap weld (FSLW) of AC4C Al alloy and AZ31 Mg alloy was produced. The joining interface had a solidified microstructure with a large volume of intermetallic compounds Mg2Si, Al12Mg17 and Al3Mg2. The present study suggests that liquation phenomenon occurred during FSLW of Al and Mg alloys.

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Numerical Simulation of Friction Stir Welding of Lap Joint

Yasuhiro Sakamoto, Tetsuro Sato

Session ID: 127
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.127.0

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Cracking during Friction Stir Spot Welding on Mg-Al binary Alloy

Kenji Shinozaki, Motomichi Yamamoto, Syohei Horie, Hitoshi Soejima, To ...

Session ID: 128
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.128.0

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Properties of copper - aluminun FSW joints

toshiaki fuse, yutaka ishiwata, yoshiyasu ito

Session ID: 129
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.129.0

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Copper plate and aluminum plate were jointed by friction stir welding. The pin of the tool was inserted mainly into aluminim side, but slightly into copper side. Inserted width into copper side was varied. Tensile strength of the joints were measuered. SEM observation and EPMA analysis were made on the interface of the joints.

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Micro-friction stir spot welding of high conductivity metals

Takahiro Kohara, Shinji Hukumoto, Atushi Yamamoto

Session ID: 130
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.130.0

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Copper and aluminum are frequently used in electric circuit device. However, it is difficult to join by resistance spot welding due to their high electric conductivity. The objectives of this study are to develop the micro-friction stir spot welding for high conductivity metals and investigate the microstructures and welding process.

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Microstructural evolution during friction stir welding of AZ31 magnesium alloy

Sergey Mironov, Qi Yang, Isamu Takahashi, Kazutaka Okamoto, Yutaka Sat ...

Session ID: 131
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.131.0

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Dissimilar Friction Stir Lap Weld Joints of Magnesium Alloy and Steel Sheets

Haruki SHINGO, YingChun CHEN, Kazuhiro NAKATA

Session ID: 132
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.132.0

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Friction stir welding of high strength Mg alloy to Al alloy

Shuhei Watanabe, Naotsugu Yamamoto, Jinsun Liao, Takuya Tsumura, Kazuh ...

Session ID: 133
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.133.0

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Solid phase welding of commercial pure Ti and A5052 aluminum alloy using rotation probe

Ryo Yoshida, Takehiko Watanabe, Atsushi Yanagisawa

Session ID: 134
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.134.0

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Microstructural and mechanical properties evolution in friction stir welded Inconel 600

Kuk Hyun Song, Hidetoshi Fujii, Kazuhiro Nakata

Session ID: 135
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.135.0

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Penetration characteristics of plasma arc drilling process for mild steel

KOU SON, KAZUOMI KUSUMOTO, HIROYUKI KUMEHARA

Session ID: 136
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.136.0

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This study discribes on penetration characterisitics of plasma arc drilling process. We have experimented under various experimental parameters such as plate thickenss,arc current and torch height, the relationships between penetration characteristics and experimental parameters were invenstigated.

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A Study of optimized conditions for grain refinement in laser heating

FANG ZHAO, Tomiko Yamaguti, Hideyuki Ikeda, Mituaki Katou, Kazumasa Ni ...

Session ID: 137
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.137.0

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Influence of gas contents on characteristics of hydrogen-propane flame in oxyfuel gas cutting

Toyoyuki Sato, Yasuyuki Yamamoto, Takashi Kato, Takashi Takeda, Masayu ...

Session ID: 138
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.138.0

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Friction stir weldability of high strength steel

Takashi Inoue, Kazuhiro Nakata, Yingchun Chen, Kuk Hyun Song, Fusaki K ...

Session ID: 201
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.201.0

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Development of Friction Stir Spot Welding for Steel Sheets

Masaru SAKAMURA, Kaoru OHISHI, Yoshihiro TAKEYASU, Takuya TSUMURA, Kaz ...

Session ID: 202
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.202.0

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Microstructure Control of Friction Stir Welded Carbon Steel Joints with Liquid CO2

Hidetoshi Fujii, Rintaro Ueji, Takahiro Tatsuno, Takuya Tsumura, Kazuh ...

Session ID: 203
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.203.0

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3.2mm S45C carbon steel plates were friction stir welded using liquid CO2. Because the liquid CO2 increases the cooling rate and then quantity of Martensite, the joint strength increases. However, any significant effect of liquid CO2 was observed at a 25mm/min welding speed.

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An effect of pre-heating by solid friction for friction stir welding with heating.

A study on friction stir welding with heating (Report 4)

TAKEHIKO TAKAHASHI, YOSHINORI SATOU, HITOSHI SATOU, YUUTA KANEKO, RIIC ...

Session ID: 204
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.204.0

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The friction stir welding with heating made a high speed joining by a pre-heating of base material. The pre-heating was carried out by solid heaters. However it had problems like low heating efficiency, thermal strain and so on. In this study, local heating by a solid friction of tool was examined. The possibility of local heating by solid friction was investigated by a numerical calculation of temperature at several conditions.

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Microstructure and mechanical properties of friction stir welded beta-titanium alloy Ti-15V-3Cr-3Sn-3Al

Yu Zhang, Shinji Yasuda, Yutaka Sato, Hiroyuki Kokawa, Seung Hwan Park ...

Session ID: 205
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.205.0

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Friction stir welding of Fe-36wt%Ni alloy

Yue Zhao, Sergey Mironov, Yutaka Sato, Hiroyuki Kokawa, Aiping Wu

Session ID: 206
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.206.0

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Examination of improvement in joint efficiency of pure titanium/oxgen free cupper friction joints

Yoshitaka Saito, Masaaki Kimura, Masahiro Kusaka, Koichi Kaizu, Akiyos ...

Session ID: 207
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.207.0

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Joining phenomena and joint strength of friction welded joint between A5052 aluminum alloy and low carbon steel

Masaaki Kimura, Hiroki Ishii, Masahiro Kusaka, Koichi Kaizu, Akiyoshi ...

Session ID: 208
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.208.0

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FEM analysis of friction torque and weld interface temperature during friction welding

Haruo Inoue, Masaaki Kimura, Masahiro Kusaka, Koichi Kaizu

Session ID: 209
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.209.0

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Autocompleting Friction Welded Joint of Mild Steel with Brass Insert Piece

Yosuke Ishino, Masaaki Kimura, Masahiro Kusaka, Koichi Kaizu

Session ID: 210
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.210.0

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Evaluation of Frction Welding's Characteristics on Cemented Carbides Materials

Masakazu Kikuchi, Mitsuru Nakamura, Takashi Umemura

Session ID: 211
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.211.0

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Evaluation of Frction Welding's Characteristics on Cemented Carbides Materials

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Small-scale friction welding of dissimilar stainless steels

Shinji Fukumoto, Koki Katayama, Kozo Okita, Tomoki Tomita, Atsushi Yam ...

Session ID: 212
Published: 2008
Released on J-STAGE: October 28, 2008

DOIhttps://doi.org/10.14920/jwstaikai.2008f.0.212.0

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The objectives of this work are to study the feasibility of friction welding on dissimilar stainless steels joints in small-scale, and develop practical guidelines for selection of process parameters. The microstructures were observed using optical microscopy, and the micro-area XRD analyses.

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