Search Results 1-20 of 88

  • 1 / 5
  • 材料表面のひずみ分布に基づく応力腐食割れの発生挙動評価  [in Japanese]

    YAMAKAWA Ryohei , FUJII Tomoyuki , TOHGO Keiichiro , SHIMAMURA Yoshinobu

    … After testing, crystal orientation on the specimen surface was measured by the electron backscattered diffraction technique, and the relationship between grain boundary character and strains at cracked and uncracked grain boundaries were investigated. …

    The Proceedings of the Materials and Mechanics Conference 2018(0), OS0727, 2018

    J-STAGE 

  • Effect of grain boundary microstructure on fatigue crack propagation in ferritic stainless steel  [in Japanese]

    YANG Weitao , KOBAYASHI Shigeaki , SAITO Sakae

    … <p>Effect of grain boundary microstructure, such as the spatial distribution and the connectivity of grain boundaries with different character, on the process of fatigue crack propagation in SUS430 ferritic stainless steel was investigated using the technique combined in-situ observations of crack propagation with EBSD measurements. …

    Transactions of the JSME (in Japanese) 84(857), 17-00353-17-00353, 2018

    J-STAGE 

  • Evolution of grain boundary character distribution during grain boundary engineering of 304 austenitic stainless steel  [in Japanese]

    Tokita Shum , Kokawa Hiroyuki , Sato Yutaka , Fujii Hiromichi

    304オーステナイト系ステンレス鋼の粒界性格分布制御機構を系統的な加工熱処理条件の調査と加熱その場EBSD観察によって調査した。加工熱処理中の異常粒成長に伴い対応粒界頻度が増加し、異常粒成長粒の衝突の際にランダム粒界を不連続化するような双晶バリアントが発生することが明らかになった。

    Preprints of the National Meeting of JWS 2017s(0), 102-103, 2017

    J-STAGE 

  • Optimization of grain boundary control process based on twinning in SUS304 stainless steel  [in Japanese]

    OKADA Rei , KOBAYASHI Shigeaki

    The Proceedings of Yamanashi District Conference 2017(0), 107, 2017

    J-STAGE 

  • Effect of grain boundary connectivity on grain boundary degradation phenomena in SUS304 stainless steel  [in Japanese]

    KOBAYASHI Shigeaki , KOBAYASHI Ryosuke

    … <p>Grain boundary degradation phenomena, such as sensitization and intergranular corrosion, result in embrittlement in austenitic stainless steel. … The connectivity of random boundaries was evaluated by fractal analysis, because grain boundary degradation phenomena preferentially percolated along the random boundary network. …

    The Proceedings of the Materials and Mechanics Conference 2016(0), OS11-06, 2016

    J-STAGE 

  • Control of grain boundary character distribution of 304 austenitic stainless steel utilizing bending deformation  [in Japanese]

    Kurosawa Kentarou , Kodama Shohei , Kokawa Hiroyuki , Sato Yutaka , Fujii Hiromichi

    ひずみ勾配が粒界性格分布に与える影響について考察するためにオーステナイト系ステンレス鋼に曲げ加工でひずみ勾配を付与し、結晶方位解析を行った。対応粒界頻度はひずみ量が圧延による圧下率相当で1~4%となる領域で増加し、ひずみ勾配の付与は加工熱処理の最適化に利用できることが示唆された。

    Preprints of the National Meeting of JWS 2016f(0), 230-231, 2016

    J-STAGE 

  • Onset of Secondary Recrystallization in High Purity 3.3%Si Steel  [in Japanese]

    Hayakawa Yasuyuki , Omura Takeshi , Imamura Takeshi

    … It was also shown that normal grain growth was suppressed in the sample in which secondary recrystallization occurred. … Narrow grain size distribution and strong texture accumulation were considered to help the stabilization of the matrix grains.<br>Texture development during secondary recrystallization in the absence of inhibitors was discussed based on proposed growth models. …

    Tetsu-to-Hagane 101(10), 536-545, 2015

    J-STAGE 

  • G0301501 Effect of grain boundary microstructure on fatigue fracture in SUS430 stainless steel  [in Japanese]

    YANG Weitao , KOBAYASHI Shigeaki , SAITO Sakae

    … Role of grain boundaries in crack nucleation and crack propagation path in SUS430 stainless steels during high-cycle fatigue was investigated based on the observation results of grain boundary microstructure evaluated by scanning electron microcopy (SEM)/ electron back scattered diffraction (EBSD) analyses, to obtain a clue to grain boundary engineering for improvement of the fatigue property. …

    The Proceedings of Mechanical Engineering Congress, Japan 2015(0), _G0301501--_G0301501-, 2015

    J-STAGE 

  • Onset of Secondary Recrystallization in High Purity 3.3%Si Steel

    Hayakawa Yasuyuki , Omura Takeshi , Imamura Takeshi

    … It was also shown that normal grain growth was suppressed in the sample in which secondary recrystallization occurred. … Narrow grain size distribution and strong texture accumulation were considered to help the stabilization of the matrix grains.<br>Texture development during secondary recrystallization in the absence of inhibitors was discussed based on proposed growth models. …

    ISIJ International 54(10), 2385-2393, 2014

    J-STAGE 

  • OS1115 Control of high-cycle fatigue fracture based on grain boundary engineering in SUS316L stainless steels  [in Japanese]

    KOBAYASHI Shigeaki , OGOU Satoshi

    … The grain boundary (GB) engineering for improvement of fatigue property in SUS316L austenitic stainless steel was investigated. … In-situ observations of fatigue crack propagation revealed that the local crack propagation rate strongly depends on the spatial distribution of GBs having different character and structure. …

    The Proceedings of the Materials and Mechanics Conference 2014(0), _OS1115-1_-_OS1115-2_, 2014

    J-STAGE 

  • Effects of Distribution and the Formation Process of MA on Deformation and Toughness of High Strength Linepipe Steel

    TSUYAMA Seishi , NAKAMICHI Haruo , YAMADA Katsumi , ENDO Shigeru

    … Because of the different formation processes, grain boundary character is also different. … The interface of MA and matrix in the on-line heat process sample is divided by short length Kurdjumov-Sacks (K-S) orientation grain boundaries. … On the other hand, long length random grain boundaries are formed at the interface of the off-line heat process material. …

    ISIJ International 53(2), 317-322, 2013-02-15

    J-STAGE  References (10)

  • Experimental Researches on Resistance Heat Aided Friction Stir Welding of Mg Alloy

    Luo Jian , Li Fei , Chen Wei

    … Analysis of the grain boundary character distribution by optical microscope showed that the weld zone defects decreased, and smoother and more compact joint appearance was accessed by combining the direct electric current with the conventional FSW. … In addition, raising the value of electric current promoted the joint quality and refined the grain size in the weld nugget zone (WNZ) and thermo mechanically affected zone (TMAZ) dramatically. …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 31(4), 65s-68s, 2013

    J-STAGE 

  • Improvement of Corrosion Resistance in Austenitic Stainless Steel by Grain Boundary Character Distribution Control  [in Japanese]

    WANG Yun , KANEDA Junya , KASAHARA Shigeki , SHIGENAKA Naoto

    材料と環境 : zairyo-to-kankyo 61(9), 359-365, 2012-09-15

    References (9)

  • Improvement of Corrosion Resistance in Austenitic Stainless Steel by Grain Boundary Character Distribution Control  [in Japanese]

    王 昀 , 金田 潤也 , 笠原 茂樹 [他]

    材料と環境 61(9), 359-365, 2012-09

  • Improvement of Corrosion Resistance in Austenitic Stainless Steel by Grain Boundary Character Distribution Control  [in Japanese]

    Wang Yun , Kaneda Junya , Kasahara Shigeki , Shigenaka Naoto

    粒界性格を制御したオーステナイト系ステンレス鋼SUS316Lにおいて,Strauss試験,Coriou試験およびHuey試験を行い,低Σ対応粒界頻度の向上による粒界腐食の低減を確認した.また,γ線照射下ですきま腐食試験を実施した結果,制御材の粒界腐食発生数は,非制御材の1/10以下となり,粒界腐食深さも非制御材より短かった.高温高圧水環境におけるSCCの進展速度は,制御材が非制御材の1/2以下とな …

    Zairyo-to-Kankyo 61(9), 359-365, 2012

    J-STAGE 

  • G030083 Grain boundary character dependence of local crack propagation rate in sulfur-doped polycrystalline Ni  [in Japanese]

    MARUYAMA Tatsuya , KOBAYASHI Shigeaki , SAITO Sakae

    … In-situ observations of crack propagation in sulfur-doped polycrystalline nickel were carried out using the specimens whose grain boundary microstructure was predetermined by SEM/EBSD analyses, in order to reveal the effect of grain boundary microstructure on the crack propagation process in segregation-induced brittle polycrystalline materials. …

    The Proceedings of Mechanical Engineering Congress, Japan 2012(0), _G030083-1-_G030083-3, 2012

    J-STAGE 

  • Grain Boundary Character Distribution on the Surface of Cu(In,Ga)Se2Thin Film

    Minemoto Takashi , Wakisaka Yoichi , Takakura Hideyuki

    Japanese Journal of Applied Physics 50, 031203-031203, 2011-03-22

    DOI 

  • Improvement of Stress Corrosion Cracking Resistance in Austenitic Stainless Steel by Grain Boundary Character Distribution Control  [in Japanese]

    WANG Yun , KANEDA Junya , SHIGENAKA Naoto

    粒界性格を制御したオーステナイト系ステンレス鋼における隙間付き定変位曲げ試験により,低Σ対応粒界頻度の向上により,応力腐食割れの粒界数および長さが低減することを確認した.また,割れ経路上の粒界性格分析で,低Σ対応粒界がランダム粒界より耐応力腐食割れ性に優れることを定量的に評価した.さらに,粒界三重点の分析から,低Σ対応粒界頻度の増加により,ランダム粒界の分断効果が期待され,材料全体の耐応力腐食割れ …

    Zairyo-to-Kankyo 60(3), 141-146, 2011-03-15

    J-STAGE  References (12)

  • Grain boundary character distribution on the surface of Cu(In,Ga)Se2 thin film

    Minemoto Takashi , Wakisaka Yoichi , Takakura Hideyuki

    Japanese journal of applied physics 50(3), 031203-1〜4, 2011-03

    DOI 

  • Orientation Dependence of High-Angle Grain Boundary Formation during Sliding Wear in Copper Single Crystals  [in Japanese]

    OHNO Yoshihiro , INOTANI Junichi , KANEKO Yoshihisa , HASHIMOTO Satoshi

    … Evolution of high-angle grain boundaries during the sliding wear was investigated by the electron backscatter diffraction (EBSD) technique. …

    Journal of the Japan Institute of Metals and Materials 74(6), 384-391, 2010-06-01

    J-STAGE  References (11) Cited by (1)

  • 1 / 5
Page Top