Experimental Research on Effect of Mirror Milling and Chemical Milling on Fatigue Property of 2024 Al Alloy
YANG Qingping1, SHU Maosheng2, WEI Xingchi3, MAO Jian3, CAO Zhenzhen1, ZHONG Liuchun4
1. Chengdu Useful Technology Co., Ltd., Chengdu 610511, China;
2. AVIC Chengdu Aircraft Design and Research Institute, Chengdu 610091, China;
3. Shanghai University of Engineering Science, Shanghai 201620, China;
4. Shanghai TOP Numerical Control Technology Co., Ltd., Shanghai 201108, China
Fatigue failure is the main failure mode of mechanical failure. The effects of mirror milling and chemical milling on fatigue performance of 2024 Al alloy were analyzed in this paper. The fatigue properties of 2024 Al alloy were explored at 130 MPa, 140 MPa and 149 MPa stress levels by using group test method. The results show that the overall stability of the mirror milling is better than that of the chemical milling, the tensile strength is comparable, and the standard deviation of the life of the mirror milling test pieces is about three times that of the chemical milling; the median logarithmic fatigue life of the mirror milling test pieces is better than that of the chemical milling at all three stress levels. The relationship curves between stress level and fatigue life of 2024 Al alloy at 50%, 95% and 99.9% survival rates are obtained, which provide a reference for quantitative analysis of the effects of mirror milling and chemical milling processes on fatigue performance of the material.
杨青平,舒茂盛,卫星驰,茅健,曹珍珍,钟柳春. 镜像铣与化铣对2024铝合金疲劳性能影响试验研究[J]. 航空制造技术, 2022, 65(22): 94-100,107.
YANG Qingping, SHU Maosheng, WEI Xingchi, MAO Jian, CAO Zhenzhen, ZHONG Liuchun. Experimental Research on Effect of Mirror Milling and Chemical Milling on Fatigue Property of 2024 Al Alloy[J]. Aeronautical Manufacturing Technology, 2022, 65(22): 94-100,107.