文献类型：期刊文献

英文题名：On micro-defect induced cracking in very high cycle fatigue regime

作者：Zhu, Ming-Liang[1];Zhu, Gang[1];Xuan, Fu-Zhen[1]

机构：[1]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：45

期号：11

起止页码：3393

外文期刊名：FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES

收录：;EI(收录号：20222912358096);WOS:【SCI-EXPANDED(收录号:WOS:000823307500001)】；

基金：National Natural Science Foundation of China, Grant/Award Numbers: 51835003, 51922041

语种：英文

外文关键词：design against fatigue; fine granular area; machine learning; micro-defect; very high cycle fatigue

摘要：It is known that fine granular area morphology is often formed around interior micro-defect in the case of very high cycle fatigue failure of high strength steel. The mechanism of "fragmentation of martensitic laths and formation of dislocation cells" (Zhu's model), which revealed a microstructure-dependent crack initiation and early growth for micro-defect induced internal fatigue cracking, was discussed in several lathy martensitic or similar steels, verified under environmental fatigue, and applicable to white etching crack in rotating contact fatigue. A machine learning-Z parameter integrated approach was developed for fatigue life, which is promising for design against fatigue of engineering structures for long life.