沈阳工业大学学报2012，Vol.34Issue(4)：402-406,5.
Sc对金属型铸造甜一Si—Cu．Mg合金疲劳行为的影响
Influence of Sc on fatigue behavior of permanent-mould casting AI-Si-Cu-Mg alloy
摘要
Abstract
In order to determine the effect of rare earth element Sc on the low-cycle fatigue behavior of the permanent-mould casting Al-Si-Cu-Mg alloy,the low-cycle fatigue tests were performed for the permanent-mould casting Al-Si-Cu-Mg alloys with and without adding Sc.The results show that at the higher total strain amplitudes,both permanent-mould casting Al-Si-Cu-Mg and Al-Si-Cu-Mg-Sc alloys exhibit the cyclic strain hardening.However,the rare earth element Sc has greater influence on the cyclic stress response behavior of the alloy at the low total strain amplitude.For the Al-Si-Cu-Mg alloy,the cyclic strain hardening occurs at the initial stage of fatigue deformation,and the cyclic stability is noted at the later stage of fatigue deformation.However,the cyclic strain hardening is observed during the whole fatigue deformation for the Al-Si-Cu-Mg-Sc alloy.Furthermore,the addition of rare earth element Sc can effectively enhance the cyclic deformation resistance and prolong the fatigue lives of the permanent-mould casting Al-Si-Cu-Mg alloy.关键词
Al—si—Cu—Mg合金/稀土元素Sc/金属型铸造/低周疲劳/疲劳寿命/循环应力响应/循环应变硬化/循环稳定Key words
A1-Si-Cu-Mg .alloy/rare element Sc/permanent-mould casting/low-cycle fatigue/fatiguelife/cyclic stress response/cyclic strain hardening/cyclic stability分类
矿业与冶金引用本文复制引用
车欣,陈立佳,李锋..Sc对金属型铸造甜一Si—Cu．Mg合金疲劳行为的影响[J].沈阳工业大学学报,2012,34(4):402-406,5.基金项目
辽宁省高等学校优秀人才支持计划项目（LR201030）. （）
