文献类型：期刊文献

英文题名：Quantitative characterization of short fatigue crack and grain boundary interaction behavior in zirconium

作者：Zeng, Xiangkang[1];Zhang, Conghui[1];Zhu, Wenguang[1];Zhu, Mingliang[2];Wang, Yanmou[1];Zhang, Xin[1]

机构：[1]Xian Univ Architecture & Technol, Sch Met Engn, Xian 710055, Shaanxi, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：161

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20221511953105);WOS:【SCI-EXPANDED(收录号:WOS:000800347300002)】；

基金：Acknowledgements This work was supported by the National Natural Science Foundation of China (Grant Nos. 51674187) , International Joint Research Center for Value-added Metallurgy and Processing of Non-ferrous Metals (Grant Nos. 2019SD0010) , and the Key Industry Chain (Group) -Industrial Field in Shaanxi Province (Grant Nos. 2019ZDLGY05-03) .

语种：英文

外文关键词：Short fatigue crack growth; Grain boundary; Schmid factor; Geometrical compatibility factor; Twist angle

摘要：Short fatigue crack growth behavior of zirconium was quantitatively investigated through post-mortem electron backscattering diffraction analyses. Results show that the short fatigue crack growth was mainly transgranular, sensitive to crystallographic orientation which determined the slip systems within grains and often deflected at grain boundaries. The cracks propagated preferentially on prismatic slip planes and pyramidal slip planes due to higher Schmid factor for each grain. A set of crack deflection at grain boundaries was quantitatively analyzed. A combination of the geometrical compatibility factor, m', and twist angle, alpha, as well as the Schmid factor, m, were proposed to evaluate short fatigue crack growth across grain boundaries. It was found the short fatigue crack could cross grain boundaries on the conditions of m > 0.3, alpha < 40, and m' > 0.3.