摘要
为了研究Er对挤压态Al-0.8%Mg-0.6%Si合金的低周疲劳行为的影响,进行了总应变控制的室温低周疲劳实验。结果表明,低周疲劳加载条件下,挤压态Al-0.8%Mg-0.6%Si和Al-0.8%Mg-0.6%Si-0.5%Er合金主要呈现循环应变硬化现象;Er的添加可以显著提高挤压态Al-0.8%Mg-0.6%Si合金的循环变形抗力,但却降低其室温低周疲劳寿命。
In order to explore the influence of rare earth Er on the cyclic stress response behavior and low-cycle fatigue life of as-extruded Al-0.8% Mg-0.6% Si alloy,the strain controlled low-cycle fatigue tests were performed at room temperature.The results indicate that both extruded Al-0.8% Mg-0.6% Si and Al-0.8% Mg-0.6% Si-0.5% Er alloys show the cyclic strain hardening during fatigue deformation.Due to the addition of 0.5% Er,the cyclic deformation resistance of the Al-0.8%Mg-0.6% Si alloy gets significantly enhanced,while the low-cycle fatigue life of the Al-0.8% Mg-0.6% Si alloy is decreased.
出处
《稀土》
EI
CAS
CSCD
北大核心
2015年第3期95-99,共5页
Chinese Rare Earths
基金
沈阳市工业科技攻关专项(F13-076-2-00)
关键词
铝合金
ER
循环应力响应
低周疲劳
aluminum alloy
Er
cyclic stress response
low-cycle fatigue
