摘要
研究了超轻Ｍｇ－８Ｌｉ合金的高温超塑力学性能。实验表明，在变形温度５７３Ｋ，应变速率５ｘｌ０－４Ｓ－１的条件下内获得最大延伸率９６０％。从对数真应力－真应变速率曲线得到的应变速率敏感性指数为０．６４。该值表明在Ｍｇ－８Ｌｉ合金中发生了晶界滑移为主要变形机制的高温变形过程。
The superplastic mechanical behavior at elevated temperature has been investigated for ultralightMg-8Li alloy.The experimental results show that maximum elongation of 960% can be obtained under the superplastic condition of deformation temperature 573 K and initial strain rate 5×10-4s-1. the exponent of strain rate sensitivity is 0.64 obtained from the log-log plot of stress versus true strain rate,which indicates that dominent deformation mechanismat elevated temperature is grain boundary sliding (gbs)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
1997年第2期27-30,共4页
Rare Metal Materials and Engineering
关键词
镁锂合金
超塑性
力学性能
magnesium-lithum alloy,superplasticity,Mechanical behavior
