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Preprints of the National Meeting of JWS

Displaying 101-150 of 198 articles from this issue

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Evaluation Method for Charpy Impact Toughness of Laser Welds Using Side-grooved Specimen

Hiroto Shoji, Yasuhito Takashima, Mitsuru Ohata, Fumiyoshi Minami

Session ID: 249
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.101.0

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The method to predict Charpy impact toughness of laser welds with various width of weld metal and strength mismatch from impact test result of side-grooved specimen was proposed based on the FE-analytical results of deformation behaviors of the normal and side-grooved specimens.

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Method for Evaluating Fracture Toughness using Small Specimen

–Application to Master Curve Approach–

Mitsuru Ohata, Ryuta Kasada, Akihiko Kimura, Kiyoyuki Shiba, Hiroyasu ...

Session ID: 250
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.102.0

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A method for evaluating valid fracture toughness, that is defined as toughness obtained with standard 1TC(T) compact specimen in this work, from small-sized C(T) specimen was discussed through numerical analyses of crack-tip stress fields by FE-method.

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Assessment of warm pre-stress effects on cleavage fracture by the Master Curve Method

Yoichi Yamashita

Session ID: 251
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.103.0

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The warm pre-stress effects, which produce an apparent increase in fracture toughness, may have great importance in structural integrity where thermal transients are considered. This study investigates the WPS effects of Load-Unload-Cool-Fracture transient with single edge bend specimens of 780-MPa high strength steel. And the methodology of the assessment for WPS effects on cleavage fracture was proposed with the Master Curve method.

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Prediction of Tensile Strain Limit for Internally Pressurized Pipe with Circumferential Surface Flaw based on R-curve

Takahiro SAKIMOTO, Satoshi IGI, Mitsuru OHATA, Fumiyoshi MINAMI

Session ID: 252
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.104.0

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Effect of retained austenite on the fractography of Ni-Cr weld metal

Hai Qiu, Hong ZUO, Kazuo HIRAOKA

Session ID: 253
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.105.0

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Effect of Microstructural Heterogeneity in Two-Phase Steel on Strain History Dependence of Ductility

Takashi Okubo, Mitsuru Ohata, Fumiyoshi Minami, Takashi Matsuno, Eisak ...

Session ID: 254
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.106.0

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Volume fraction of Ferrite-Pearlite steel exhibited difference in strain history effect on ductility. The mechanism of the strain history effect was discussed by observing the damage evolution and damage simulation using 3D microstructural FE-model.

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Diffusion Bonding between Sintered cBN and Cemented Carbides(Report 2)

YUTA MAENO, Mitsuru Nakamura, Takashi Umemura

Session ID: 301
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.107.0

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Diffusion Bonding between cBN Ceramics and Cemented Carbides

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Diffusion Bonding between Cemented Carbides

yasuhiro shira, hidenobu gonda, toshiaki yasui, osamu oohashi, masahir ...

Session ID: 302
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.108.0

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Behavior of Cobalt for Diffusion Bonding between Cemented Carbides

Hidenobu Gonda, Yasuhiro Shirai, Toshiaki Yasui, Osamu Ohashi, Masahir ...

Session ID: 303
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.109.0

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Diffusion bonding of Pd membrane and stainless steel

Satoko Yoda, Toshi-Taka Ikeshoji, Akio Suzumura, Takahisa Yamazaki

Session ID: 304
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.110.0

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For the diffusion bonding of the membrane with micrometer thickness, it is not investigated in details of the phenomenon like the brakeage of the membrane, the deterioration of the function of the membrane by the change in its compositions and microstructures as the result of diffusion. In this research, apparent diffusion coefficients of Pd into stainless steel are estimated. And the optimum bonding condition of Pd membrane and stainless steel are suggested.

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Experimental study on deformation capacity and strength of beam-to-column welded connection for Galvanization

Hiroyuki Ito, Tadao Nakagomi, Yoshihiro Sakino, Yosuke Kawabata, Yuta ...

Session ID: 305
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.111.0

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Experimental study on deformation capacity of beam-to-column welded connection using SA440 for beam and column

Part1 Outline of Experiment

Yosuke Kawabata, Tadao Nakagomi, Yosihiro Sakino, Yuta Fujimaki

Session ID: 306
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.112.0

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Experimental study on deformation capacity of beam-to-column welded connection using SA440 for beam and column

Part2 Result of experiment and consideration

Yosuke Kawabata, Tadao Nakagomi, Yosihiro Sakino, Yuta Fujimaki

Session ID: 307
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.113.0

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Supression of sensitization for braze-pressure welding joint by using high-frequency induction heating

Toshi-Taka Ikeshoji, Akio Suzumura, Takahisa Yamazaki

Session ID: 308
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.114.0

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During the braze pressure welding (BPW), its joint can be achieved with the low joining pressure, because the clening metal make the joining interface clean. The BPW can join the pipe tube which is difficult for the conventional pressure joining. For the stainless steel tube pipe, the sensitization always arise around the welding joint. By using the high frequency inductio heating, it is shown that the BPW can joint the stainless steel tube pipe without the sensitization.

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Strength Properties in Friction Stir Welding of Mg Alloy

shinji sato, daiki sato, takahiro endou, yutaka sato

Session ID: 309
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.115.0

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In this research, the friction stir welding experiment of Mg alloy (AZ31) was tried. The tool number of rotations and the diameter of a shoulder at that time were examined. Especially, it evaluates about the texture of a junction, tensile strength, and hardness, and aims at finding the optimal condition of FSW.

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Effect of introduced strain on precipitation behavior in friction stir welded Al alloy with paint-bake-hardening response

Natsumi Abe, Hiroshi Baba, Suhuddin U.F.H.R., Yutaka Sato, Hiroyuki Ko ...

Session ID: 310
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.116.0

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Effect of welding parameters on texture evolution during friction stir welding of Mg alloy

Hiroe Takahashi, Sergey Mironov, Yutaka Sato, Hiroyuki Kokawa

Session ID: 311
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.117.0

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Fabrication of CNT-reinforced Aluminum alloy by friction stir processing

Tomonobu Owa, Syunsuke Sakai, Tsukasa Koizumi, Hidekazu Takizawa

Session ID: 312
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.118.0

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The fabrication of the surface composite of carbon nano-tube (CNT) and 2017 aluminum alloy formed by friction stir processing were investigated. We will report ways of adding CNT to 2017 alloy, micro-structural observation results, and strength test results.

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Evaluation of microstructure and mechanical properties of friction stir welding joints of dissimilar Mg alloys

Duo LIU, Hiroyuki NISHIO, Kazuhiro NAKATA, Takanori NAMISE, Hisanori Y ...

Session ID: 313
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.119.0

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Mechanical Properties of Dissimilar Friction Stir Spot Welded Joints of Aluminum and Steel by Spherical Surface Tool

masaru sakamura, kaoru ohishi, yoshihiro takeyasu, hidetoshi fujii, ka ...

Session ID: 314
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.120.0

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Quantitative measurement of Material Flow in Simulated Welding between Aluminum and Steel by Friction Stirring

YOICHIRO SHIMODA, MASAMI TSUBAKI, TOSHIAKI YASUI, MASAHIRO FUKUMOTO

Session ID: 315
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.121.0

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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, quantitative material flow velocities between transparent PVC and S45C during welding were measured by high speed video camera and analysis of PIV.

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Dissimilar spot welding between Mg alloy and Al alloy by friction stirring

Takaaki Suzuki, Masami Tsubaki, Toshiaki Yasui, Masahiro Hukumoto, Tak ...

Session ID: 316
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.122.0

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Magnesium alloy is attracted attention because of its high specific strength and light weight. But magnesium alloy is low corrosion resistance, it is useful to combine use of magnesium alloy and aluminum alloy for increasing use. In this study, spot welding between magnesium alloy and A1070 by friction stirring, and the strength and the microstructure of weld joints were investigated.

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A Two-step Rotation Bonding of 6061Al and 5052 Al Alloys

Yufeng Sun, Hidetoshi Fujii, Naoki Takaki, Okitsu Yoshitaka

Session ID: 317
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.123.0

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In this study, a novel two-step rotation bonding method was applied for the joining of 1mm-thick Al alloys. In the first step, the work-piece was rotation bonded on a specially designed black plate and the keyhole was removed in the second step by using a pinless rotation tool. After bonding, the microstructure observation and mechanical properties were characterized to evaluate this joining methods used for different kinds of Al alloys.

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Simulation Analysis of Tool Configuration in Friction Stir Spot Welding

Keita HATAKEYAMA, Toshiyuki HASEGAWA, Michinori OKUBO

Session ID: 318
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.124.0

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Effect of Tool Geometry on Material Flow during Friction Stir Spot Welding

Shohei HORIE, Kenji SHINOZAKI, Motomichi YAMAMOTO, Kota KADOI, Hirotak ...

Session ID: 319
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.125.0

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Experiment for tool tip temperature measurement in Spot FSW (2)

kazuki tani, takeshi shinoda, yohei katsuragi

Session ID: 320
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.126.0

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Effect of welding parameters on several properties in friction stir welded high nitrogen steel

Kei Nakamura, Kohei Matsuzu, Yutaka Sato, Hiroyuki Kokawa

Session ID: 321
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.127.0

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Effect of welding parameters on several properties in friction stir welded 304 stainless steel

Kei Nakamura, Masahiro Miyake, Yutaka Sato, Hiroyuki Kokawa

Session ID: 322
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.128.0

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Fabrication of nanostructured tool steel layer by friction stir processing on laser clad layer

Yoshiaki Morisada, Hidetoshi Fujii, Tadashi Mizuno, Genryu Abe, Yusuke ...

Session ID: 323
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.129.0

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Microstructure and properties of friction stir welded 12%Cr steel

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

Session ID: 324
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.130.0

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Influence of Insert Filler on Lapped FSW between FCD450 and SUS304

Mayumi NEMOTO, Mitsuru Nakamura, YUKI SAWADA

Session ID: 325
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.131.0

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Influence of Insert Filler on Lapped FSW between FCD450 and SUS304

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Surface Modification of Austenitic Stainless Steels by Friction Stir Processing

yumiko tsuchiya, masashi takahashi, norihisa saito, hidetoshi fujii

Session ID: 326
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.132.0

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Friction stir processing (FSP) has a possibility to improve the corrosion and SCC resistance of stainless steels by its grain refinement effect that is brought about by the simultaneous addition of mechanical mixing and friction heat. In the present study, the effect of surface modification is evaluated utilizing. FSP.

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Effect of steel sheet strength on friction stir spot weldability

Koichi Taniguchi, Muneo Matsushita, Rinsei Ikeda, Shigeru Endo

Session ID: 327
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.133.0

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We evaluated friction stir spot welded joint of 270MPa and 980MPa grade steel sheets of 1.2mm thick welded by Si3N4 tool. And we clarified the effect of plastic flow state and weld structure by pressure welding on tensile sheer strength and cross tensile strength of friction stir spot welded joint.

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Effect of FSP condition on mechanical properties of thermally sprayed cemented carbide layer

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

Session ID: 328
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.134.0

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

Young Dong Chung, Hidetoshi Fujii, Yufeng Sun

Session ID: 329
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.135.0

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The joints of the carbon steel sheets were obtained using friction stir welding with the liquid CO2. The effect of the liquid CO2 was investigated to obtain good mechanical properties and microstructure of the joints. The optimum welding parameters were determined for the FSW with liquid CO2 joints of carbon steel sheets.

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Friction Stir Welding of Carbon Steels Assisted by High Frequency Heating System

sangjin Hong, Hidetoshi Fujii, Jun Tazaki, Kaoru Sugita

Session ID: 330
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.136.0

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The material used in this study was carbon steels and was carried out using High Frequency Heating System subjected to increases welding speed. The process optimization was evaluated to be changed by high frequency coil current and welding parameter. The good mechanical properties were obtained for the welded specimen.

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Microstructure and Toughness in Stir Zone for Friction Stir Welding of Thick Steel Plates

Muneo Matsushita, Yasushi Kitani, Rinsei Ikeda, Shigeru Endo, Hidetosh ...

Session ID: 331
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.137.0

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Friction stir welding (FSW) was performed with single pass-one side welding on the 12mm thick steel plates with 390N/mm2 grade of tensile strength. The variations of the metallurgical and mechanical properties in the stir zone were characterized, analyzing the microstructure, hardness, toughness, thermal cycle and plastic flow in the stir zone.

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Development of the strengthened Ir based tool for friction stir welding.

Tomoaki Miyazawa, Yuichi Iwamoto, Tomohiro Maruko, Hidetoshi Fujii

Session ID: 332
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.138.0

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Development of Co-based friction stir welding tool for steels and Ti alloys

Yutaka Sato, Masahiro Miyake, Hiroyuki Kokawa, Toshihiro Omori, Kiyohi ...

Session ID: 333
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.139.0

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Establishment of TATSUMAKI Friction Stir Welding Using Concave-Convex Shaped Tool

Development of TATSUMAKI Friction Stir Welding (Part 1)

SEUNG HWAN C. PARK, SATOSHI HIRANO, SHINICHI KAGA, MITSURU ONOSE, NORI ...

Session ID: 334
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.140.0

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Weldability of Thin Sheet Material in TATSUMAKI Friction Stir Welding

Development of TATSUMAKI Friction Stir Welding (Part 2)

SEUNG HWAN C. PARK, SATOSHI HIRANO, SHINICHI KAGA, MITSURU ONOSE, NORI ...

Session ID: 335
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.141.0

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Comparison of friction stir welding behaviors among several thermoplastics

Hirohito Hira, Ryouhei Sugiyama, Toshiya Shibayanagi

Session ID: 336
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.142.0

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Joining Mechanism in Butt Welding Process of Plastics by Heating Tool with Stirring Effect

Kenji Nakamura, Junichiro Nihara, Chihiro Iwamoto, Shinobu Satonaka

Session ID: 337
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.143.0

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Development of Ferritic Stainless Steel Laser Welded Pipe for Exhaust System

INSU WOO

Session ID: 338
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.144.0

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Laser welded 14%Cr ferritic stainless steel pipe developed in this study showed superior properties during severe forming process and can improve the productivity without PWHT (Post Weld Heat Treatment). Laser welded pipe showed the minimum width of the weld and lower hardening effect than those of GTA and high frequency induction welded pipe, which resulted in better formability.

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Low Temperature Toughness of Weld Metal in Super Austenitic Stainless Steels

MASANORI GOKOU, SHIGERU HIRATA, YUUJI IKEGAMI

Session ID: 339
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.145.0

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Effect of grain boundary engineering on the intergranular corrosion resistance of stabilized austenitic stainless steels

Kohei Kurihara, Hiroyuki Kokawa, Yutaka Sato, Hiromichi Fujii

Session ID: 340
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.146.0

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Effects of additional strain and anneal on corrosion properties of grain boundary engineered austenitic stainless steels

Gouki Yamada, Yu Yasuda, Hiroyuki Kokawa, Yutaka Sato, Hiromichi Fujii

Session ID: 341
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.147.0

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Behavior of Intermetallic Compound in Dissimilar Welds between SPCC steel and A6061 aluminium alloy by Spot Welding

Toshiyuki HASEGAWA, Hitoshi MITOMI, Michinori OKUBO

Session ID: 342
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.148.0

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Effect of Repeated Welding Heat Cycles on Microstructures of Cast Iron Deposited Metal

TSUGUO HONDA, HIRONORI KUROKI, TOMIKO YAMAGUCHI, KAZUMASA NISHIO

Session ID: 343
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.149.0

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Quantitative consideration for the tempering effect during thermal cycle in the HAZ of low-alloy steel

Lina Yu, Yuma Nakabayashi, Masashi Kameyama, Shinro Hirano, Naoki Chig ...

Session ID: 344
Published: 2010
Released on J-STAGE: November 09, 2010

DOIhttps://doi.org/10.14920/jwstaikai.2010f.0.150.0

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New parameter based on Larson-Miller parameter has been proposed to evaluate the tempering effect during thermal cycle in the HAZ of low-alloy steel. The experimental result has revealed that the predicted hardness by calculation using the new parameter is well fitted with the measures one.

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