材料科学与工程学报2017，Vol.35Issue(5)：741-746,6.DOI:10.14136/j.cnki.issn 1673-2812.2017.05.011
AZ91D室温环境棘轮及其低周疲劳行为
Ratcheting and Low Cycle Fatigue Behavior of AZ91D at Room Temperature
摘要
Abstract
By low cycle fatigue experiments at room temperature under stress control,the ratcheting and low cycle fatigue behavior of cast magnesium alloy AZ91D were studied.In this research,the effects of load level and loading histories on the stress cycle characteristic,ratcheting behavior,plastic strain range and total strain range of AZ91D were discussed.And then,the stress-life curve was analyzed based on the mean stress modification.Results show that the stress cycle of AZ91D at room temperature exhibits cyclic hardening.The ratcheting behavior,plastic strain range and total strain range of AZ91D depend on load levels and loading histories.In addition,compared with the stress-life curve without modification,the prediction effect of the stress-life curve with the mean stress modification is significantly improved.关键词
铸造镁合金AZ91D/低周疲劳/棘轮行为/平均应力Key words
cast magnesium alloy AZ91D/low cycle fatigue/ratcheting behavior/mean stress分类
矿业与冶金引用本文复制引用
陈凌,张贤明,刘飞,欧阳平,贾艳艳..AZ91D室温环境棘轮及其低周疲劳行为[J].材料科学与工程学报,2017,35(5):741-746,6.基金项目
中国博士后科学基金面上资助项目(2015M582523),重庆市博士后科研项目资助项目(Xm2016061),重庆市教委科学技术研究资助项目(KJ1500624),重庆工商大学科研启动经费资助项目(2014-56-10) （2015M582523）
