Improving the fatigue performance of AZ31 sheet with hole via electromagnetic cold expansion process

被引：16
作者：
Geng, Huihui [1 ,2 ]
Xu, Xiaofei [3 ]
Cao, Quanliang [1 ,2 ]
Lai, Zhipeng [1 ,2 ]
Li, Liang [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Peoples R China
[3] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Hunan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY | 2022年 / 120卷 / 7-8期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Electromagnetic cold expansion; Fatigue property; Residual stress; Hole component; AZ31 magnesium alloy; RESIDUAL-STRESS FIELDS; ALLOY; LIFE; JOINTS; TOOL;
D O I：
10.1007/s00170-022-08931-9
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Improving the fatigue life of hole components is very important since cracks are often initiated from the hole wall due to stress concentration. In this study, the non-contacting electromagnetic cold expansion process (EMCE) was employed to improve the fatigue life of the AZ31 sheet with fastening hole. Simulation was done to investigate the distribution of residual stress and strain around the hole during the EMCE process. The effect of EMCE process on the surface integrity of the hole specimen was investigated via 3D super depth digital microscope. EBSD was utilized to observe the deformation and grain size distribution near the hole edge. Fatigue test was done to verify the feasibility of EMCE process on improving the fatigue life of thin AZ31 sheet specimen, and the fatigue fracture was observed by SEM. Results showed that the EMCE process can improve the fatigue life and fatigue limit of the AZ31 specimen. The specimen treated by EMCE process showed well surface integrity, and grain refinement was observed near the hole edge.
引用
收藏
页码：5057 / 5071
页数：15
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