Search Results 1-20 of 151

  • Microstructure and Impact Toughness Relationship for Different Nickel Level of Electrode in Multi-pass FCA Welded SM570-TMC Steel Joint

    WINARTO Winarto , OKTADINATA Herry , SIRADJ E.S. , PRIADI Dedi , BASKORO Ario S. , ITO Kazuhiro

    … A study was carried out to evaluate the relationship of microstructure and impact toughness for different nickel level of electrodes in multipass flux-cored arc welded SM570-TMC steel joint. … The multipass welds were run by using flux-cored arc welding (FCAW) with a flat position (1G). …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 38(2), 154s-158s, 2020

    J-STAGE 

  • Hot Cracking Susceptibility of Commercial Filler Metals for Alloy 617 by Varestraint Test:-Study of Hot Cracking of Alloy 617 in Multipass Welds-  [in Japanese]

    YAMASHITA Shotaro , KAMIMURA Kenji , NIKI Takahiro , OGURA Tomo , SAIDA Kazuyoshi

    … Fracture surface of cracking in alloy 617 multipass welds by GTA welding exhibited a possibility of occurrence of both solidification cracking and liquation cracking. …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 38(1), 1-10, 2020

    J-STAGE 

  • Arc Welding Penetration Control utilizing Electromagnetic Controlled Molten Pool Welding  [in Japanese]

    ASATO Toshinaga , MATSUDA Shoich , TANAHARA Yasushi , ONODA Yuhei

    … <p>In fusion welding, gravity makes molten metal flow downward and it sometimes causes an irregular-shaped weld bead and weld defects. … This problem makes it difficult to conduct high-quality and high-deposition rate welding. … To solve this problem, the authors propose an ECMP (Electromagnetic Controlled Molten Pool Welding Process) method which controls the molten metal flow by using an upward electromagnetic force. …

    The Proceedings of Mechanical Engineering Congress, Japan 2017(0), G0400303, 2017

    J-STAGE 

  • Influence of Jig Constraint on Deformation under Welding  [in Japanese]

    KAWAJIRI Yoshitaka , IKUSHIMA Kazuki , NAGAKI Yuto , OOMAE Toru , SHIBAHARA Masakazu

    大型鋼構造物の製作時には溶接変形の低減を目的に、拘束治具を設けて溶接を施工することがある。本研究では鋼板の多層溶接時に生じる変形に及ぼす拘束治具に関する諸因子の影響について評価を行うために、3次元熱弾塑性解析手法を用いて検討した。

    Preprints of the National Meeting of JWS 2016f(0), 340-341, 2016

    J-STAGE 

  • Numerical Simulation of Stress Relief Processing in Fracture Toughness Test of Thick Section Welds  [in Japanese]

    Mikami Yoshiki , Mochizuki Masahito , Kawabata Tomoya

    厚板多層溶接部の破壊靭性試験では,溶接残留応力の影響により疲労予亀裂が適切に導入されない場合がある.溶接残留応力除去のために,逆曲げやプラテンが行われるが,その効果や適切な条件は必ずしも明確ではない.本報告では,逆曲げやプラテンによる残留応力分布の変化を数値解析により検討した.

    Preprints of the National Meeting of JWS 2016f(0), 356-357, 2016

    J-STAGE 

  • Ductility-Dip Cracking Susceptibility in Laser Multipass Weld Metal of Alloy 690  [in Japanese]

    Morikawa Yusuke , Ogura Tomo , Saida Kazuyoshi

    Ni基690合金レーザ多層盛溶接金属における延性低下割れ感受性をバレストレイン試験により評価し,割れ感受性に及ぼすP,S含有量および溶接速度の影響を明らかにするとともに,その変化原因を粒界偏析シミュレーションにより考察した.

    Preprints of the National Meeting of JWS 2016f(0), 218-219, 2016

    J-STAGE 

  • Evaluation of Ductility-Dip Cracking Susceptibility in Alloy 690 Laser Multipass Weld Metal by Varestraint Test  [in Japanese]

    OGURA Tomo , MORIKAWA Yusuke , SAIDA Kazuyoshi

    … Ductility-dip cracking susceptibility in the laser multipass weld metal of alloy 690 was quantitatively evaluated using different filler metals varying the contents of P and S. … In order to synthesize a ductility-dip crack in the laser multipass weld metal, the cross-bead longitudinal-Varestraint test with laser welding was applied under the various welding speed. … Furthermore, the DTR was decreased with an increase in the welding speed. …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 34(3), 181-188, 2016

    J-STAGE 

  • Influence of Jig Constraint on Deformation of Multipass Welding  [in Japanese]

    KAWAJIRI Yoshitaka , IKUSHIMA Kazuki , NAGAKI Yuto , OOMAE Toru , SHIBAHARA Masakazu

    大型鋼構造物の製作時には溶接変形の低減を目的に、拘束治具を設けて溶接を施工することがある。本研究では鋼板の多層溶接時に生じる変形に及ぼす拘束治具の影響についての評価を行うために、3次元熱弾塑性解析手法を用いてその影響について検討した。

    Preprints of the National Meeting of JWS 2016s(0), 214-215, 2016

    J-STAGE 

  • Influence of Diameter and Thickness on Residual Stress in Multipass Butt Weld Joint of Pipe  [in Japanese]

    Takahashi Ryotaro , Kawahara Atsushi , Maekawa Akira , Murakawa Hidekazu

    配管の継手溶接部に生じる残留応力はSCC(応力腐食割れ)などの損傷の重要な影響因子であり、損傷評価には残留応力を的確に把握し反映する必要がある。そこで、本研究では実機の狭開先形状大口径配管溶接継手についてFEMを用いて解析し、口径および板厚が残留応力分布に及ぼす影響について検討する。

    Preprints of the National Meeting of JWS 2015f(0), 398-399, 2015

    J-STAGE 

  • Effect of processing parameters of multipass friction stir processing on microstructure and hardness of 7075 aluminum alloy  [in Japanese]

    MATSUDA Yutaka , ITOH Goroh , MOTOHASHI Yoshinobu

    … Friction stir processing (FSP) has been proposed by applying friction stir welding, FSW, as a method for controlling the microstructures to improve mechanical properties. … In this study, microstructure of a 7075 aluminum alloy subjected to multipass FSP, MP-FSP, are assessed to obtain fundamental knowledge on MP-FSP. …

    Journal of Japan Institute of Light Metals 63(1), 2-7, 2013-01-30

    J-STAGE  References (17)

  • Effect of Sodium on Repair-Weldability of SUS316FR for Fast Breeder Reactor  [in Japanese]

    CHUN Eun Joon , BABA Hayato , NISHIMOTO Kazutoshi , SAIDA Kazuyoshi

    … From microstructural observation of the weld metal, there would be a possibility that metallic sodium existed at cell boundaries in the weld metal during welding solidification. … Finally, it was confirmed that any solidification cracks and blowholes did not occur in the overlaid weld metal through multipass laser cladding tests. …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 31(4), 260-271, 2013

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  • Microcracking Susceptibility in Dissimilar Multipass Welds of Ni-Base Alloy 690 and Low-Alloy Steel  [in Japanese]

    SAIDA Kazuyoshi , BUNDA Kousuke , OGIWARA Hiroyuki , NISHIMOTO Kazutoshi

    … Microcracking susceptibility in the dissimilar multipass weld metal of alloy 690 and low-alloy steel A533B was evaluated, and the effect of dilution on hot cracking (ductility-dip and liquation cracking) behavior was investigated. … In order to simulate the dissimilar multipass weld metal of alloy 690 to A533B steel, the A533B plate was welded under the various dilution ratios using the alloy 690 filler metal with different contents of P and S. …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 31(3), 181-192, 2013

    J-STAGE 

  • Evaluation Method for Generation Characteristics of Inherent Strain in Multipass Weld : Simulation and Evaluation of Weld Distortion Behavior in Multipass Welded Joint  [in Japanese]

    TADANO Satoshi , NAKATANI Yuujiro , SUGAHARA Asahi , OKANO Shigetaka , MOCHIZUKI Masahito , TANAKA Akira

    拘束治具や溶接順序を考慮した大型構造物向けの簡易な多層溶接変形解析が求められている.本研究では,溶接継手DBに基づく固有ひずみ解析に着目し,多層溶接に伴う固有ひずみの変化を簡易に評価する手法について検討した.手法の有効性については溶接変形解析を通して検証および考察を行った.

    Preprints of the National Meeting of JWS 91, 270-271, 2012-09-03

    J-STAGE  References (2) Cited by (1)

  • Additional of REM effect for prevention of micro cracking in dissimilar multipass welds of Alloy 690 to type 316L stainless steel  [in Japanese]

    OKAUCHI Hironori , SAIDA Kazuyoshi , NISHIMOTO Kazutoshi

    溶接学会論文集 : quarterly journal of the Japan Welding Society 29(3), 225-233, 2011-12-31

    References (7)

  • Prediction of Austenite Retention in Triplex Stainless Steel Weld Metals during Multipass Welding  [in Japanese]

    SAIDA Kazuyoshi , ARAKI Norihiko , OGIWARA Hiroyuki , MORI Hiroaki , NISHIMOTO Kazutoshi

    溶接学会全国大会講演概要 89, 90-91, 2011-08-18

    References (1)

  • Hydrogen Embrittlement of Multipass Weld Metal for HT780 Class Steel  [in Japanese]

    KITAGAWA Yoshihiko

    Journal of High Temperature Society 37(4), 203-211, 2011-07-20

    References (24)

  • Hot Cracking Susceptibility of Alloy 52 Filler Metals in Alloy 690 Multipass Welding  [in Japanese]

    SAIDA Kazuyoshi , NOMOTO Yuki , BUNDA Kousuke , OGIWARA Hiroyuki , NISHIMOTO Kazutoshi

    バレストレイン試験により市販52系合金溶加材の高温割れ感受性を評価した結果、粒界蛇行性が大きい溶加材では、延性低下割れ感受性が低下した。延性低下割れ感受性が最も低い52MSS溶加材では、凝固/液化割れ感受性が増大した。

    Preprints of the National Meeting of JWS 88, 120-121, 2011-03-28

    J-STAGE 

  • Prediction of Austenite Retention in Triplex Stainless Steel Weld Metals during Multipass Welding  [in Japanese]

    Saida Kazuyoshi , Araki Norihiko , Ogiwara Hiroyuki , Mori Hiroaki , Nishimoto Kazutoshi

    三相系ステンレス鋼多層盛溶接金属における残留γ量を予測することを目的として、逆変態を考慮した再熱溶接金属の残留γ生成モデルを作成した。多重熱サイクルを受けた溶接金属の残留γ量の計算結果は、実測結果とほぼ一致し、多層盛溶接過程での残留γ量が予測可能となった。

    Preprints of the National Meeting of JWS 2011f(0), 42-42, 2011

    J-STAGE 

  • Influence of groove shape on hydrogen diffusion in thick plate multipass weld  [in Japanese]

    YAMADA Junya , ABE Masamitsu , NAKATANI Mitsuyoshi , TERASAKI Toshio

    厚板多層溶接では低温割れが問題となることがあり,その発生因子の一つに水素が挙げられる.本研究では数値解析を用いることにより,Cr-Mo-V鋼における板厚内の水素拡散挙動に及ぼす板厚や開先角度などの開先形状の影響について検討した.さらに,その解析結果をもとに適正な脱水素処理条件について検討した.

    Preprints of the National Meeting of JWS 2011f(0), 40-40, 2011

    J-STAGE 

  • Hydrogen Embrittlement of Multipass Weld Metal for HT780 Class Steel  [in Japanese]

    KITAGAWA Yoshihiko

    Journal of High Temperature Society 37(4), 203-211, 2011

    J-STAGE 

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