Contributions of Grain Size and Crystal Orientation to Fatigue Crack Deflection and Branching Behavior in Low Carbon Steel Plates

Thao Phuong BUI; Yukio MIYASHITA; Yasushi MORIKAGE; Tetsuya TAGAWA; Tsunehisa HANDA; Yoshiharu MUTOH; Yuichi OTSUKA

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Contributions of Grain Size and Crystal Orientation to Fatigue Crack Deflection and Branching Behavior in Low Carbon Steel Plates

机译：低碳钢板疲劳裂纹挠度和分支行为对晶粒尺寸和晶体取向的贡献

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In-situ observation of fatigue crack growth behavior under ΔK-constant cyclic loading in Paris regime for two Thermo-Mechanical Control Process (TMCP) steels with different grain size was carried out. It was found from the results that crack closure dominantly contributed to fatigue crack growth resistance in the fine grain material, while crack tip stress shielding induced by crack deflection and crack branching dominantly contributed to fatigue crack growth resistance in the coarse grain material. The electron back scatter diffraction (EBSD) analysis revealed that crack deflection and crack branching in the coarse grain material were induced in the grain with (101) crystal orientation intensively under co-existence of the grain with (001) crystal orientation and also along the grain boundary between the grains with (101) and (001) crystal orientations. Hence, higher content ratio of the grains with (001) crystal orientation could contribute to higher crack growth resistance.

机译：在ΔK恒定循环载量下进行疲劳裂纹生长行为的原位观察，对不同晶粒尺寸的两个热机械控制过程（TMCP）钢进行了两个热机械控制过程（TMCP）钢。从裂纹闭合裂纹裂纹裂缝中的结果中发现了它的结果，而通过裂纹偏转和裂纹支化引起的裂纹尖端应力屏蔽源于粗粒材料中的疲劳裂纹生长抗性。电子背面散射衍射（EBSD）分析显示，在具有（001）晶体取向的晶粒的共存下，在晶粒中诱导粗粒材料中的裂纹偏转和裂缝支化在晶粒中，与（001）晶体取向的共存，也沿着晶粒与（101）和（001）晶体取向之间的晶界。因此，具有（001）晶体取向的颗粒的较高含量比可以有助于较高的裂纹生长抗性。

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来源
《ISIJ international》 |2021年第1期|424-433|共10页
作者
Thao Phuong BUI; Yukio MIYASHITA; Yasushi MORIKAGE; Tetsuya TAGAWA; Tsunehisa HANDA; Yoshiharu MUTOH; Yuichi OTSUKA;
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作者单位

Graduate School of Materials Science Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka-shi Niigata 940-2188 Japan;

Department of Mechanical Engineering Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka-shi Niigata 940-2188 Japan;

JFE Techno-Research Corporation 1-1 Minamiwataridacho Kawasaki-ku Kawasaki-shi Kanagawa 210-0855 Japan;

JFE Steel Corporation 1 Kawasaki-cho Chuo-ku Chiba-shi Chiba 260-0835 Japan;

JFE Steel Corporation 1 Kawasaki-cho Chuo-ku Chiba-shi Chiba 260-0835 Japan;

Department of System Safety Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka-shi Niigata 940-2188 Japan;

Department of System Safety Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka-shi Niigata 940-2188 Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
fatigue crack growth; grain size; crystal orientation; crack deflection; crack branching; crack closure; crack tip stress shielding;

机译：疲劳裂纹增长;晶粒尺寸;晶体取向;裂缝偏转;裂缝分支;裂缝关闭;裂纹尖端应力屏蔽;

Contributions of Grain Size and Crystal Orientation to Fatigue Crack Deflection and Branching Behavior in Low Carbon Steel Plates

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