摘要
采用Gleeble-1500热模拟机高温压缩与高温拉伸试验，对一种新型Al-Cu-Li系合金的高温塑性变形进行了研究，并利用扫描电镜和透射电镜对该合金高温变形后的组织进行了观察。结果表明，在350℃-470℃的变形温度范围内，以1s^-1～30s^-1，的变形速度压缩时，合金的极限压下量基本都在80％以上。以30s^-1应变速度压缩时，在470℃时极限压下量陡然下降，说明变形速度很大时变形温度不宜过高。分别以0．1^-s叫和1s^-1叫变形速度拉伸时，在410℃-470℃温度区间塑性较好。
The high temperature plastic deformation of a new-type Al-Cu-Li alloy is studied by high temperature compression test and high temperature tension test on Gleeble 1500 thermal-mechanical simulator, and the deformation microstructure of the alloy after high temperature deformation is investigated by SEM and TEM. It shows that when the strain rates between 1s^-1 and 30s^-1 , and temperature bewteen 350℃ and 470℃, the ultimate reductions of hot compression are all above 80%. But as the strain rate is 30s^-1 , the ultimate reduction falls suddenly. So the temperature is unfavorable too high when the strain rate is very high. When tensiled with the strain rate are 0. 1s^-1 and 1s^-1 , the suitable temperature range is 410℃ to 470℃.
出处
《塑性工程学报》
EI
CAS
CSCD
北大核心
2007年第1期10-14,共5页
Journal of Plasticity Engineering
基金
北京科技大学新金属材料国家重点实验室开放研究基金资助项目
关键词
铝锂合金
高温压缩变形
高温拉伸变形
变形速度
Al-Li alloys
high temperature compression
high temperature tension
strain rate
