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You-Chul Kim, Hiroshi Horikawa, Yasuo Agano
Session ID: 361
Published: 2006
Released on J-STAGE: November 09, 2006
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Life of the bridge which is a social infrastructure is called 50 years, it is impossible economically we build all bridges, and to exchange.For Overage steel, I report an examination result for Lamellar tearing felt uneasy about by repair reinforcement by welding.
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Yoshihiro SAKINO, Shinya TAKAHASHI, Hisaya KAMURA, You-Chul KIM
Session ID: 362
Published: 2006
Released on J-STAGE: November 09, 2006
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It is important to pay attention to mechanical properties in HAZ for fracture. In this paper, the effect of welding heat input and high-strain rate to tensile strength and fracture elongation of HAZ are investigated by simulated HAZ test and high speed tensile test.
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Atsushi Fukase, Nobuyuki Fujii, Katsuhiko Yasuda, Hironori Honda
Session ID: 363
Published: 2006
Released on J-STAGE: November 09, 2006
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Nodular graphite cast iron includes a lot of carbon. Therefore it is difficult to weld Nodular graphite cast iron.In this study, we examined welding methods from mechanical strength and a welding characteristic for practical use.
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Junya Nakajima, Hiroshi Kawakami, Jippei Suzuki
Session ID: 401
Published: 2006
Released on J-STAGE: November 09, 2006
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Effect of initial roughness on Al/Cu bonding in air was investigated at bonding in this study. Abrasive paper of #180 and #400 used for polishing Influence of surface setting direction was considered also. Bonded specimen could not be obtained blow 863K in spite of roughness.
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Keiko Kimura, Hirosi Kawakami, Jippei Suzuki
Session ID: 402
Published: 2006
Released on J-STAGE: November 09, 2006
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Al bonding in the air with Cu, Sn and Zn was investigated in this paper. Sn insert metal is not available at 883K over melting point of Sn. Otherwise Cu and Zn are available for bonding in the air. Nominal tensile stress of bonded specimen inserted Zn was about 40MPa.
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-Penetration of Cu into Grain Boundary of HAZ-
Hitoshi Nishimura, Jing-bo Wang, Kouji Fujii, Kazumi Shimizu, Seiji Ka ...
Session ID: 403
Published: 2006
Released on J-STAGE: November 09, 2006
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In the first report, the authors reported a result about the joint properties of MIG brazed joints. In this report, the authors will report the results of penetration of Cu into grain boundary of HAZand the effects of applied stresses and heat inputs.
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Daisuke Takesawa, Mituru Nakamura
Session ID: 404
Published: 2006
Released on J-STAGE: November 09, 2006
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Brazing characteristics of Cemented carbides for concrete drill was investigeted.
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yukihiro nomura, kazumasa nishio, tomiko yamaguchi, mituaki katou, yu ...
Session ID: 405
Published: 2006
Released on J-STAGE: November 09, 2006
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Ni-based self fluxing alloy coating which was fused by laser has the structure which consist of Cr carbides and Cr borides and hardness of the coating was increased.Wear resistance has improved most in laser fusing condition fd=45mm
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Takayuki KUWASHIMA, Hiroshi HORIE, Takashi SAITOH, Takahito TAKAGAWA, ...
Session ID: 406
Published: 2006
Released on J-STAGE: November 09, 2006
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In this study cast iron powders were sprayed using HVOF spraying method. Sprayed coatings were heat-treated to examine the influence of heat treatment condition on their micro structure. Coating structure was observed by SEM and analyzed by EPMA.
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Jialiang Zhang, Akira Kobayashi
Session ID: 407
Published: 2006
Released on J-STAGE: November 09, 2006
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Thermal conductivity of ZrO2 and Al2O3 composite coating is obtained using the parallel hot plates technique. The result shows the thermal conductivity of coatings depends strongly on the porosity but slightly on the thickness of the coatings.
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Shouhei Kameoka, Kazumasa Nishio, Tomiko Yamaguchi, Mitsuaki Kato, Jin ...
Session ID: 408
Published: 2006
Released on J-STAGE: November 09, 2006
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In this steady, the electric resistance welding with seam welding machine was investigated. The results showed. The things that cladding layer can be made with the Fe of matrix in the WC, the Fe of matrix in WC-6.5Co and Co in the powders was affirmed.
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Micro Spark Coating of Heat and Corrosion Resisting Alloys (Report 1)
Kazutoshi Nishimoto, Kazuyoshi Saida, Nobuyuki Sumi, Kazushi Nakamura, ...
Session ID: 409
Published: 2006
Released on J-STAGE: November 09, 2006
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Microstructural analysis and evaluation of proprties of TiC film by micro sparck coating was carried out. Optimization of processing parameters satisfying the aspiration levels of properties of film was conducted by using multi-objective programming method.
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Akira Kobayashi, Shoji Yano, Hisamichi Kimura, Akihisa Inoue
Session ID: 410
Published: 2006
Released on J-STAGE: November 09, 2006
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The Fe-base metal glass coatings were produced by the gas tunnel type plasma spraying, and the microstructure and mechanical property were investigated. The Fe-base metal glass coatings of 100 micrometer in thickness were formed.
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Hajime TODA, Zhanjie WANG, Hiroyuki KOKAWA
Session ID: 411
Published: 2006
Released on J-STAGE: November 09, 2006
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(La, Sr)CoO3 (LSCO)thin films were grown on SiO2/Si substrates by a metallo-organic decomposition method, and their crystalline structure, microstructure and electrical properties were investigated.
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WATARU Takahara, FUMIYOSHI Minami
Session ID: 412
Published: 2006
Released on J-STAGE: November 09, 2006
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Chemical bonding nature of SiO4 tetrahedra in silica phase is investigated by the DV-Xalpha method. Remarkable substitution effects are observed in P and Ca. Element selection problems in biological nano-structural design are deeply linked to the chemical bonding nature of Si-O.
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Akira Kobayashi, Hideki Hamanaka
Session ID: 413
Published: 2006
Released on J-STAGE: November 09, 2006
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The decomposition treatment of CO2 gas is an important research subject in order to solve the global enviromental ploblem. In this study, the possibility of transforming CO2 gas to carbon material was discussed.
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Makoto Takahashi, Kenji Ikeuchi
Session ID: 414
Published: 2006
Released on J-STAGE: November 09, 2006
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Takeshi Tsukamoto, Satoshi Hirano, Akihisa Inoue
Session ID: 415
Published: 2006
Released on J-STAGE: November 09, 2006
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MASAYUKI AONUMA, MITSURU NAKAMURA
Session ID: 416
Published: 2006
Released on J-STAGE: November 09, 2006
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Pure titanium and AZ31B or ZK60A magnesium alloy rods were joined by friction welding method with different joining parameters.
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YU-ICHI SAEKI, Mituru Nakamura, MASAYUKI AONUMA
Session ID: 417
Published: 2006
Released on J-STAGE: November 09, 2006
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Friction welding between Titanium alloy and Magnesium alloy was investigated.
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Toshimitu Fujii, Kenji Seo, Masahiro Kusaka, Masaaki Kimura
Session ID: 418
Published: 2006
Released on J-STAGE: November 09, 2006
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Low carbon steel was joined by self completing operation friction welding method which was carried out with a shear fracture of a center insert piece by the initial torque. The joint had the tensile strength of the base metal, although it had a defect at the welded interface.
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Daisuke Utsumi, Kenji Seo, Masahiro Kusaka, Masaaki Kimura
Session ID: 419
Published: 2006
Released on J-STAGE: November 09, 2006
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Low carbon steel was joined by self completing friction welding method using thin-thickness insert piece with circular groove. The groove of insert piece was shear fractured by friction torque. The joint had the tensile strength of the base metal and fractured at the base metal.
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Masaaki Kimura, Masahiro Kusaka, Kenji Seo
Session ID: 420
Published: 2006
Released on J-STAGE: November 09, 2006
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The tensile strength of carbon steel square section joint by center drive friction welding method was investigated. The joint had the same tensile strength as the base metal and fractured at the base metal, although it had a defect at the adjacent region of the welded interfaces.
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Hiroki Ishii, Kenji Seo, Masahiro Kusaka, Masaaki Kimura
Session ID: 421
Published: 2006
Released on J-STAGE: November 09, 2006
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The effect of friction time on joining phenomena and tensile strength of A1050/S15CK friction welds were investigated. The adhesion of A1050 began at 1/2R area of S15CK side, then it extended toward whole welded interface. The joint fractured at A1050 side after the initial peak.
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Hiroyuki Watanabe, Makoto Takahasi, Kenji Ikeuchi, Masatoshi Aritosi
Session ID: 422
Published: 2006
Released on J-STAGE: November 09, 2006
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To investigate to effect of mechanical properties of steel on the formation of intermetallic compound layers, which was suggested by a previous paper, carbon steel S45C was friction welded to Al-Mg alloy, was compared with the observed joints Al alloy to S10C.
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Akiyoshi Kobayashi, Yuji Yasuda, Masaki Kumagai
Session ID: 423
Published: 2006
Released on J-STAGE: November 09, 2006
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The friction welding of Aluminum (A1070) and Mg alloy (AZ31) is tried from the standpoint of light weight design of machine parts in various fields. The friction welding characteristics of that welded specimens with variety experimental condition are examined.
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Kenichi Hanazaki, Tomokatsu Aizawa, Keigo Okagawa
Session ID: 424
Published: 2006
Released on J-STAGE: November 09, 2006
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Automotive wiring harnesses requires both high bonding speed and high reliability. Aluminum flat wire and Copper plates are welded by magnetic pressure from a coil. An impulse current from a capacitor bank passes through the coil. A complete weld can be observed by microscope.
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Hongjie Wang, Makoto Takahashi, Kenji Ikeuchi, Akio Ikeda
Session ID: 425
Published: 2006
Released on J-STAGE: November 09, 2006
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Softening observed in friction welds of Inconel 718 has been investigate by comparing the microstructure of welds with those observes in specimes receiving thermal cycles having peak temperatures of 980-1280C.
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Hongjie Wang, Makoto Takahashi, Kenji Ikeuchi, Akio Ikeda
Session ID: 426
Published: 2006
Released on J-STAGE: November 09, 2006
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The band strength and microstructure of friction welds of Ni-base alloy Inconel 718 have been investigated to discuss the controlling factor of the joint performance with particular reference to softening due to the reduction in the Nb content around the bond interface.
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Masataka TAMURA, Yoshinobu MAKINO, Tomokatsu AIZAWA, Keigo OKAGAWA
Session ID: 427
Published: 2006
Released on J-STAGE: November 09, 2006
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Magnetic pressure seam welding technique is solid-state welding by applied rapidly high density magnetic flux to sheet metals. It has been developed for Aluminum with high conductivity. In this paper, it was possible for stainless steel to joint by magnetic pressure seam welding.
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WATARU URUSHIHARA, MIKAKO TAKEDA, KATSUSHI MATSUMOTO, JUN KATOH
Session ID: 428
Published: 2006
Released on J-STAGE: November 09, 2006
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We study about Joining of Aluminum to Galvannealed Steel Sheet by Resistance Spot Welding.
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Katsushi Matsumoto, Mikako Takeda, Wataru Urushi hara, Jun Katoh
Session ID: 429
Published: 2006
Released on J-STAGE: November 09, 2006
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The effect of Si of aluminum alloys on the joint strength was investigated. It is confirmed that it is needed to control Si content of Al within the optimum region to develop the joint strength.
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TETSU IWASE, SEIJI SASABE, YASUNORI HATTORI, TADAAKI MIONO
Session ID: 430
Published: 2006
Released on J-STAGE: November 09, 2006
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Using low heat-input Mig welder, we tried to braze Aluminum alloy to hot-dip Aluminized steel sheet. As a result, we confirmed that the growth of the brittle Inter Metallic Compound (IMC) is to be controlled under some weld condition compared with conventional AC Mig welder.
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Development of the New Weld Schedules for Suppressing Expulsion
Manabu Fukumoto, Masato Uchihara, Kiyoyuki Fukui, Koushi Mukumoto, Tak ...
Session ID: 431
Published: 2006
Released on J-STAGE: November 09, 2006
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In this study, the mechanism of spatter during resistance spot welding is investigated using the finite element analysis. Calculated results reveal that the rapid growth of nugget and consequent spatter is mainly affected by the mechanical properties of the sheet metal.
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Report I
Kounosuke Hirai, Hideyo Takeuchi, Rinsei Ikeda, Tatsuya Nakagaito
Session ID: 432
Published: 2006
Released on J-STAGE: November 09, 2006
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New one side tandem spot welding system was developed. This system is based on resistive heating controlled by multi step current,two unique electrodes. This paper gives outlines and describes appropriate range of current, pressure force and joint characteristics.
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Rinsei Ikeda, Tatsuya Nakagaito, Kounosuke Hirai, Hideyo Takeuchi
Session ID: 433
Published: 2006
Released on J-STAGE: November 09, 2006
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New one side tandem spot welding system based on resistive heating controlled by multi step current was developed.This paper gives the mechanism of the developed welding process analyzed by calculated temperature in the joint being welded.
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Toshio Kuroda, Kenji Ikeuchi, Takeo Yamamura, Masahiro Shimada
Session ID: 434
Published: 2006
Released on J-STAGE: November 09, 2006
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Duplex srainless steels were welded by using resistance butt welding. As a result Joining effciency increased with increasing upset pressure and upset time.
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Akira Sumiyoshi, Toshio Terasaki, Hisanori Nishida, Takanori Kitamura
Session ID: 435
Published: 2006
Released on J-STAGE: November 09, 2006
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Bowl formed process by triangle heating is influenced by Gauss radius,heat input,velosity,curvature radius in direction of width,plate width and water-cooling. So these triangle heating factors on transverse shrinkage generated by FEM analysis were examined.
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wei Liang, Adan Vega, Hisashi Serizawa, Hidekazu Murakawa
Session ID: 436
Published: 2006
Released on J-STAGE: November 09, 2006
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When the thickness of the plate is large, overlapping and crossing of heating lines can not be ignored. Thus, the inherent deformation produced by the line-heating is studied quantitatively using thermal-elastic-plastic FEM and inverse analysis.
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Miho Fujii, Tetsuya Akiyama, Toshioi Terasaki
Session ID: 437
Published: 2006
Released on J-STAGE: November 09, 2006
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In this study, we clarified a property of a twisted surface and amount of in-plane strain by drawing geodesic in a twisted surface.In addtion, we analyze plate bending transformation simulation by elasticity FEM analysis and examined a twisted surface forming process.
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Kouji Kawamura, Kenji Seo, Masahiro Kusaka, Masaaki Kimura
Session ID: 438
Published: 2006
Released on J-STAGE: November 09, 2006
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FSMA composites material composed of SMA and ferromagnetic material are expected of the magnetic drive actuator. We analyzed superelastic deformation of FSMA composites coil spring. From the analytical result we discussed the best section shape of coil spring for the actuator.
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Atsushi Fujita, Toshio Terasaki, Michiaki Fukuya, Hiroki Kawakami
Session ID: 439
Published: 2006
Released on J-STAGE: November 09, 2006
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Stress analysis is important for heat treatment. So residual stress of cylinder considered the steel transformed martensite by quenching was analyzed.And effect of non-dimensional heat transfer, transformation strain and Ms temperature on residualstress distribution were studied.
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Michiaki Fukuya, Toshio Terasaki, Hiroki Kawakami, Kouki Hasegawa
Session ID: 440
Published: 2006
Released on J-STAGE: November 09, 2006
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Using the cylindrical steel that the phase transformation was not generated by during the quenching process, an accurate analysis technique for estimating the residual stress distribution was predicted even if the size of the diameter of the cylinder changed.
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Keiichi Yamasaki, Toshio Terasaki, Takanori Kitamura, Kouichiro Fukush ...
Session ID: 441
Published: 2006
Released on J-STAGE: November 09, 2006
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The residual stress is a factor which causes a brittle fracture and fatigue failure, and PWHT(post weld heat treatment) is used in order to reduce the residual stress. Measuring inherent strain, reduction of the residual stress by PWHT was examined.
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MASAYOSHI HASEGAWA, Hiroaki Suzuki
Session ID: 442
Published: 2006
Released on J-STAGE: November 09, 2006
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Welding and/or galvanizing decrease fatigue strength remarkably, but it is possible to improve fatigue strength up to the base metal by shot peening before hot galvanizing.
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Yoshihiro SAKINO, Yuji SANO, You-Chul KIM
Session ID: 443
Published: 2006
Released on J-STAGE: November 09, 2006
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Laser peening can change residual stress to compressive. In this study, the fatigue strength of welded rib-plates with laser peening is investigated by comparing to that without laser peening. As a result, effect of the laser peening to the fatigue strength was confirmed.
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Masao TOYA, Kiyokazu YASUDA, Michiya MATSUSHIMA, Kozo FUJIMOTO
Session ID: 444
Published: 2006
Released on J-STAGE: November 09, 2006
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In self-organized joining process that can supply resin containing filler to substrate and bond at a time, we examined the effect of resin flow occurred by narrowing gap between substrate and chip while bonding. As a result, nonbond and bridge decreased with slowing to 10um/s.
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Takuto Yamaguchi, Eiichi Ide, Shinji Kobayashi, Akio Hirose, Kojiro Ko ...
Session ID: 445
Published: 2006
Released on J-STAGE: November 09, 2006
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We have proposed a novel bonding process using composite nanoparticles. The sintering mechanism of the composite nanoparticles was discussed. Moreover, A Si chip was able to be bonded to Au coated Cu pad using the composite nanoparticles.
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Hideki Ozaki, Takashi Yamamoto, Akio Hirose, Kojiro Kobayashi, Masaaki ...
Session ID: 446
Published: 2006
Released on J-STAGE: November 09, 2006
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We have proposed a novel process of rapid reaction between Sn-3.5Ag solder and Ni-Fe alloy. The diffusion and formation reaction of intermetallic compounds were the most accelerated at the addition of Ni-10mass%Fe. This process can be used as an alternative packaging technology.
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Toru Nagaoka, Yoshiaki Morisada, Masao Fukusumi, Tadashi Takemoto
Session ID: 447
Published: 2006
Released on J-STAGE: November 09, 2006
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Fluxless ultrasonic soldering of A1070 was conducted at various temperatures using Sn-Zn solders. The results of tensile tests revealed that joints soldered below liquidus temperatures showed high tensile strength.
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