一种新型Al-Cu-Li系合金的高温塑性变形研究  

Study of high temperature plastic deformation of a new-type Al-Cu-Li alloy

作　　者：李红英[1] 张建飞[1] 欧玲[1] 郑子樵[1] 

机构地区：[1]中南大学有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《塑性工程学报》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

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℃.

关 键 词：铝锂合金 高温压缩变形 高温拉伸变形 变形速度 

分 类 号：TG146[一般工业技术—材料科学与工程]