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Tatsuhiro YOSHIKI, Michinori OKUBO
Session ID: 101
Published: 2006
Released on J-STAGE: November 09, 2006
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An Al-Cu alloy weldability, and a source of GTA heat was used about the sensitivity, and tensile restraint fractured. It fractured with the external stress power, and relations with the sensitivity were explained as that result.
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Kimioku Asai, Keisuke Seto
Session ID: 102
Published: 2006
Released on J-STAGE: November 09, 2006
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Research on some chracteristics (micro-structure,micra-hardness,age- hardening etc) of Al-Zn-Mg-Sc alloys weld
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Shogo Tomida, Takekazu Nagae, Satoshi Murakami, Kunimasa Takesita
Session ID: 103
Published: 2006
Released on J-STAGE: November 09, 2006
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Laser welding process has been invetigated to assemble a space frame structure in a fllowing car body using extruded aluminum alloys and casted aluminum alloys were obtained through examination of the influence of laser parameters on weldabilty.
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Hidetaka Umeshita, Hiroki Imaeda, Akio Hirose, Kojiro F. Kobayashi
Session ID: 104
Published: 2006
Released on J-STAGE: November 09, 2006
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We fundamentally analyzed interface reaction, interfacial microstructure and the effects of alloy elements on the interface reaction.Also, we measured joint strength and then evaluated the correlation between interfacial microstructure and joint strength.
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Kenji SHINOZAKI, Motomichi YAMAMOTO, Toshio FUJII, Tatsuya TANAKA, Ryo ...
Session ID: 105
Published: 2006
Released on J-STAGE: November 09, 2006
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We measured high-temperature critical strain for solidification crack of heat-resisting magnesium alloys of AMCa 403 by in-situ observation system. using YAG laser and high-speed camera. Then solidification cracking susceptibility of semi-solid magnesium alloys was evaluated.
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Seiji Sasabe, Tetsu Iwase, Yasunori Hattori, Tadaaki Miono
Session ID: 106
Published: 2006
Released on J-STAGE: November 09, 2006
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The performance of dissimilar metal joint of aluminum alloys by using the developed aluminized steel in MIG-brazing, is superior to that by using the ordinary ones.This is supposedly due to the existence of the non-formation of the brittle inter metallic compounds at root area.
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YASUNORI HATTORI, TADAAKI MIONO, TETSU IWASE, SEIJI SASABE
Session ID: 107
Published: 2006
Released on J-STAGE: November 09, 2006
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In dissimilar metal joint of Al alloys by using the developed aluminized steel in spot-welding, the formation of a Fe-Al IMC free region at a joint boundary brings about high joint strenth. The mechanism of the formation of it is atudied in detail using TEM.
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Shinji Hojo, Shingo Iwatani, Tadaaki Katayama, Akio Hirose, Koujirou K ...
Session ID: 108
Published: 2006
Released on J-STAGE: November 09, 2006
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An oxide layer on Al alloy disturbs bonding of Al alloy and steel. In this study, Al-Zn eutectic melting reaction was available to remove oxide layer and improve the bondability by inserting Zn. We investigated the bonding mechanism and estimated tensile strength of joints.
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Toshio Kuroda, Kenji Ikeuchi, Masahiro Shimada, Hisamichi Kimura, Akih ...
Session ID: 109
Published: 2006
Released on J-STAGE: November 09, 2006
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Stainless Steels were welded by resistance welding inserting Zr metal and Zr-based metallic glass. And this structure and mechanical property were investigated.
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eiji ashida, Xudong Zhang, Xiangjun Luo, Noriaki Gotou
Session ID: 110
Published: 2006
Released on J-STAGE: November 09, 2006
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Laser-arc hybrid welding of high Mn austenitic stainless steel was investigated. The welding conditions were established and the properties of welded joint were evaluated. It shows that hybrid-welded joint has the same metallurgical and mechanical properties as TIG welded joint.
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Noriyuki Matsuoka, Takeshi Nakata, Reisuke Ito, Terumi Nakamura, Kazuo ...
Session ID: 111
Published: 2006
Released on J-STAGE: November 09, 2006
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Hiroshi Kato, Makoto Takahashi, Kenji Ikeuchi, Yoshihiro Kikuchi, Hito ...
Session ID: 112
Published: 2006
Released on J-STAGE: November 09, 2006
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A heavily deformed layer introduced into the surface of stainless steel SUS316 by machining with a cutting tool has been investigated by TEM observation and nano-indentation tests to reveal the effect of weld thermal cycle on its microstructure and mechanical properties.
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Yukihiro Soga, Takamasa Matsumoto, Masahiro Tsukamoto, Toshiya Shibaya ...
Session ID: 113
Published: 2006
Released on J-STAGE: November 09, 2006
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We report about Local heating system using a fiber laser for control of grain structure in metal.
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Yoshihiko Kitagawa, Kenji Ikeuchi, Toshio Kuroda, Yukinobu Matsushita, ...
Session ID: 114
Published: 2006
Released on J-STAGE: November 09, 2006
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The hydrogen embrittlement susceptibility of the multi pass weld metal for HT780 class steel has been investigated by using specimens subjected to thermal cycles simulating the reheat by following pass during MAG welding.
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Syuji Sasakura, Reiichi Suzuki
Session ID: 115
Published: 2006
Released on J-STAGE: November 09, 2006
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Influence of each factor on hot crack performance of go-back welding on beam-to-column connection of steel frame structures
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Tomonori Yamada, Yu-ichi Komizo, Hidenori Terasaki, Masahiko Hamada
Session ID: 116
Published: 2006
Released on J-STAGE: November 09, 2006
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Deoxidation products in weld metal of low carbon steel (Ti-B system) were analyzed for samples with different [Al]/[O] ratio. Solid-state transformation for those samples was in-situ observed with high temperature laser scanning confocal microscopy.
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Hidenori Terasaki, Tomonori Yamada, Yu-ichi Komizo
Session ID: 117
Published: 2006
Released on J-STAGE: November 09, 2006
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The morphological development of acicular ferrite in-situ, was observed during weld cooling. The sample was schematically heated and cooled by infrared imaging furnace and the morphological developments were directly observed using laser scanning conforcal microscopy.
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in-situ observation of weld solidification process using synchrotron radiation (report 5)
Mitsuharu Yonemura, Takahiro Osuki, hidenori Terasaki, Yuichi Komizo, ...
Session ID: 118
Published: 2006
Released on J-STAGE: November 09, 2006
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The experimental setup for time resolved in-situ observation of phase transformation during solidification and cooling (10 to 10^4K/s) in welding process using synchrotron radiation and the result for several kinds of steel welds are presented.
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in-situ observation of weld solidification process using synchrotron radiation (report 6)
Mitsuharu Yonemura, Takahiro Osuki, hidenori Terasaki, Yuichi Komizo, ...
Session ID: 119
Published: 2006
Released on J-STAGE: November 09, 2006
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We developed in-situ observation system by the original time-resolved X-ray diffraction of synchrotron radiation. Growth process of NbC in invar alloy weld metal during welding solidification was observed by in-situ observation tecnique.
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In-situ observation of welding solidification process using synchrotron radiation (report 7)
Takahiro Osuki, Mitsuharu Yonemura, Kazuhiro Ogawa, Hiroyuki Hirata, Y ...
Session ID: 120
Published: 2006
Released on J-STAGE: November 09, 2006
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Numerical model to predict the solidification microstructure of auntenitic stainless steel weld metal with unequilibrium theory was developed, and In-situ observation of solidification process of weld metal using synchrotron radiation was applied to verify its validity .
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Hidenori Terasaki, Yu-ichi Komizo, Mitsuharu Yonemura, Takahiro Osuki
Session ID: 121
Published: 2006
Released on J-STAGE: November 09, 2006
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In order to characterize unidirectional solidification process, time-resolved X-ray diffraction experiments employing synchrotron radiation were performed on GTA welds of low-carbon steel, in the present work.
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Eitaro HARUYAMA, Kazuyoshi KATOH, Hiroshi TOKISUE
Session ID: 122
Published: 2006
Released on J-STAGE: November 09, 2006
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AZ31 magnesium alloy thick plate with 10 mm thickness was friction stir welded. The impact properties of FSW joints were investigated.
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masatoshi aritoshi, tomoki tomita, kenji Ikeuchi, makoto takahashi, ku ...
Session ID: 123
Published: 2006
Released on J-STAGE: November 09, 2006
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Noncombustible magnesium alloy sheet was friction-spot-welded bylap joint. Microstructure of stir zone became finer than that of base metal. Tensile shear strength was increased with welding time andreached to 2.3kN at welding time 6s.
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Hideaki Kato, Hidetoshi Fujii, Kazuhiro Nakata, Kiyoshi Nogi
Session ID: 124
Published: 2006
Released on J-STAGE: November 09, 2006
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Mo plates whose melting point are 2893K was FSWed. Ar shielding gas was used to prevent the embrittlement by O2 or H2. Cross-sections were analyzed using OM and SEM, and mechanical characteristics were evaluated by the tensile tests and the hardness examinations.
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Kazuhisa KITA, Takeshi HAMADA, Kazuo KITAGAWA
Session ID: 125
Published: 2006
Released on J-STAGE: November 09, 2006
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The relationship between microstructure and strength of copper prepared by friction stir welding was discussed. The grain size of thermo-mechanically affected zone was depended on starting temperature of welding components and resulted in the performance of fracture behavior.
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Yoshimitsu KANO, Kazuyoshi KATOH, Hiroshi TOKISUE
Session ID: 126
Published: 2006
Released on J-STAGE: November 09, 2006
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6061 aluminum alloy plate to tough pitch copper were friction spot welded using a numerical controlled brake type friction welding machine. The tensile properties of joints were investigated.
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Tomonori Yamada, Yu-ichi Komizo, Hidetoshi Hujii
Session ID: 127
Published: 2006
Released on J-STAGE: November 09, 2006
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Microstructure of friction stir welding zone and hardness distribution were investigated for duplex stainless steel. Fine grained structure was observed in stir zone on the advancing side.
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Takahiro Tatsuno, Hidetoshi Fujii, Takuya Tsumura, Manabu Tanaka, Kazu ...
Session ID: 128
Published: 2006
Released on J-STAGE: November 09, 2006
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A new welding technique named hybrid FSW was developed to decrease the defect and the tool load for the FSW of high melting point materials. The method consists of FSW and laser for preheating ahead of tool. The characteristics of hybrid FSwelded steel joints were investigated.
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Seung Hwan Park, Yutaka Sato, Hiroyuki Kokawa, Kazutaka Okamoto, Satos ...
Session ID: 129
Published: 2006
Released on J-STAGE: November 09, 2006
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Friction stir welding was tried to 0.5% nitrogen stainless steel. Microstructure and nitrogen content analysis were performed for the weld. The nitrogen content of the stir zone was roughly same with that of the base material. There was no nitrogen desorption in the stir zone.
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Masahito SANEKATA, Kazuyoshi KATOH, Hiroshi TOKISUE
Session ID: 130
Published: 2006
Released on J-STAGE: November 09, 2006
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Friction hydro pillar processing which used the 7075 aluminum alloy pipe as a rod and 2024 aluminum alloy plate was carried out, and the effect of inner diameter of rod on the filling characteristics of joint was examined.
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Yuzo Okawa, Haruo Sugii, Masashi Taniguchi, Yoji Marutani
Session ID: 131
Published: 2006
Released on J-STAGE: November 09, 2006
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New FSW system with the flexibility of five axes for joining three dimension curved surfaces has developed. This paper describes the structure and features of the system, and welded examples by this FSW system.
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Kinya Aota, Kenji Ikeuchi
Session ID: 132
Published: 2006
Released on J-STAGE: November 09, 2006
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Lap joint Aluminum plates are welded by pressing a non-consumable rotating tool only into a member of upper plate. The plastic flow of Aluminum plate occurs near the rotating tool. In this study, weldable condition and plasticity flow behavior are discussed.
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Yoshiaki Morisada, Hidetoshi Fujii, Toru Nagaoka, masao Fukusumi
Session ID: 133
Published: 2006
Released on J-STAGE: November 09, 2006
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C60 was successfully dispersed into an AZ31 using FSP. The maximum microhardness of the nanocomposite is almost three times higher than that of the AZ31 substrate.
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Shinnosuke Kurihara, Yutaka Sato, Hiroyuki Kokawa
Session ID: 134
Published: 2006
Released on J-STAGE: November 09, 2006
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Relationship between hardness profile and precipitation was examined in friction stir welded Al alloy 2024, and then precipitation phenomena during friction stir welding was discussed.
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Shinnosuke Kurihara, Yutaka Sato, Hiroyuki Kokawa
Session ID: 135
Published: 2006
Released on J-STAGE: November 09, 2006
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Relationship between corrosion property and microstructure in friction stir welded Al alloy 2024 was examined. Corrosion property was reduced in the heat affected zone, which would be due to formation of the overaged microstructure during friction stir welding.
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Toshiya Shibayanagi, A.Khodir Saad
Session ID: 136
Published: 2006
Released on J-STAGE: November 09, 2006
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SEM-EBSP method is utilized to characterize spatial distribution of grain orientations in friction stir welded 2024 aluminum alloy. The WD, ND and TD planes of the weld showed some peculiar orientation distributions that are fluctuating.
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Masaru Sakamura, Masami Ohkawa, Kaoru Ohishi, Takuya Tsumura, Kazuhiro ...
Session ID: 137
Published: 2006
Released on J-STAGE: November 09, 2006
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Window frames of ships are made of aluminium alloys. Aluminium alloys are TIG welded. When aluminium alloys are anodised in order to improve corrosion resistance after TIG welding,the color of TIG joint zone is changed. To prevent the discoloration,We tried to use FSW.
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Akihiro SEKINE, Kazuyoshi KATOH, Hiroshi TOKISUE
Session ID: 138
Published: 2006
Released on J-STAGE: November 09, 2006
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6061 aluminum alloy plate were lap friction welded using an automatic FSW machine. The effect of tool diameter on tensile properties of lap joints was investigated
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Dai NAKAMA, Kazuyoshi KATOH, Hiroshi TOKISUE
Session ID: 139
Published: 2006
Released on J-STAGE: November 09, 2006
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The effect of surfacing method of the alumina particle and surfacing conditions on the distribution of the alumina particle in the deposit was examined, when aluminum alloy composite material was made by the friction surfacing.
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Hiroki ARASHIDA, Kazuyoshi KATOH, Hiroshi TOKISUE
Session ID: 140
Published: 2006
Released on J-STAGE: November 09, 2006
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6061 aluminum alloy plate were friction spot welded using a numerical controlled brake type friction welding machine. The effect of tool diameter on tensile properties of joints was investigated.
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Hirohisa Ikegami, Takuya Tsumura, Mitsuji Ueda, Kazuhiro Nakata
Session ID: 141
Published: 2006
Released on J-STAGE: November 09, 2006
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Magnesium alloy has a lot of attention as the lightweight and recyclable material for the next generation and is planning to apply the car body and railroad vehicle. In this study, spot friction weldability of magnesium alloys are evaluated.
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Shinichi Tashiro, Toru Iwao, Tsuginori Inaba, Manabu Tanaka
Session ID: 201
Published: 2006
Released on J-STAGE: November 09, 2006
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In this presentation, numerical simulation results of argon Gas Tungsten Arc with non-equilibrium model will be presented.
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Shinichi Tashiro, Hiroshi Nishikawa, Manabu Tanaka
Session ID: 202
Published: 2006
Released on J-STAGE: November 09, 2006
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In this presentation, experimental results of effective work function of cathode in helium TIG will be presented.
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Yoji Ogawa
Session ID: 203
Published: 2006
Released on J-STAGE: November 09, 2006
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Some amount of metal is evaporating from the mother metal. These vapors change plasma temperature distribution. The dynamic arc behavior on arc igniton stage has been observed by high-speed video system, which measure spectrum distribution.
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Kakeru Senoo
Session ID: 204
Published: 2006
Released on J-STAGE: November 09, 2006
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There is often poor welding in arc welding. Therefore I examine the monitoring technique used Radiation power to occur from an arc discharge as a method to discover poor welding. I examine kind of characteristic is provided from Radiation power when poor welding happened.
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Masahito Ishikawa, Soshu Kirihara, Yoshinari Miyamoto
Session ID: 205
Published: 2006
Released on J-STAGE: November 09, 2006
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3D Micro-Welding is the freeforming system of metals. We made titanium objects by 3DMW, and evaluated their mechanical characteristics. In addition, the surface nitriding of titanium objects was tried by melting them in arc emission, and the surface hardening was investigated.
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Daisuke Yamabe, Shinichiro Shobako, Fumikazu Miyasaka, Takayoshi Ohji
Session ID: 206
Published: 2006
Released on J-STAGE: November 09, 2006
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We have discussed effect of plasma forming gas on hollow cathode arc (HCA) as the basic study of HCA under the condition of low pressure. Concretely speaking, we have experimented and researched discharging and plasma characteristics of HCA under a few plasma forming gases.
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Yoshikazu Suita, Masahiro Oohara, Kazunori Matsushita, Hiroki Sogawa, ...
Session ID: 207
Published: 2006
Released on J-STAGE: November 09, 2006
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We performed butt welding experiments of aluminum by GHTA(Gas Hollow Tungsten Arc) welding in simulated space environment. We examined welding phenomena, macrostructure and mechanical properties of the joints. As a result, we showed the possibility of space application of GHTA.
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Mitsuyoshi NAKATANI, Kazuhiko TANI, Manabu TANAKA, Shinichi TASHIRO
Session ID: 208
Published: 2006
Released on J-STAGE: November 09, 2006
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It is well known that the arc pressure of the hollow cathode is low. In this research, we clarified that the plasma arc characteristics of TCA(Tube Cathode Arc) by experiment and numerical analysis.
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Mitsuyoshi NAKATANI, Kazuhiko TANI, Michitaka FURUBAYASHI, Kazunori NA ...
Session ID: 209
Published: 2006
Released on J-STAGE: November 09, 2006
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The plasma-type ash melting furnace in which an arc plasma is generated between two carbon electrodes is a simple device for being able to melt the incineration ash and produce the slag. This paper shows the numerical analysis of the plasma arc.
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