In-depth analysis of the fatigue mechanism induced by inclusions for high-strength bearing steels

作     者：Chao Gu Wen-qi Liu Jun-he Lian Yan-ping Bao Chao Gu;Wen-qi Liu;Jun-he Lian;Yan-ping Bao

作者机构：State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingBeijing 100083China Department of Mechanical EngineeringAalto UniversityPuumiehenkuja 302150 EspooFinland 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2021年第28卷第5期

页      面：826-834页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was financially supported by the Fundamental Research Funds for the Central Universities(No.FRF-TP-20-026A1) the China Postdoctoral Science Foundation(No.2020M680348) the State Key Laboratory of Advanced Metallurgy Foundation of China(No.41620001) 

主　　题：inclusion high-strength bearing steel fatigue numerical study stress distribution 

摘      要：A numerical study of stress distribution and fatigue behavior in terms of the effect of voids adjacent to inclusions was conducted with finite element modeling simulations under different *** mechanisms were also analyzed *** results showed that the effects of inclusions on fatigue life will distinctly decrease if the mechanical properties are close to those of the steel *** the inclusions,which are tightly bonded with the steel matrix,when the Young’s modulus is larger than that of the steel matrix,the stress will concentrate inside the inclusion;otherwise,the stress will concentrate in the steel *** voids exist on the interface between inclusions and the steel matrix,their effects on the fatigue process differ with their positions relative to the *** void on one side of an inclusion perpendicular to the fatigue loading direction will aggravate the effect of inclusions on fatigue behavior and lead to a sharp stress *** void on the top of inclusion along the fatigue loading direction will accelerate the debonding between the inclusion and steel matrix.