细晶1420铝锂合金超塑性能试验研究  

The experimental research on superplastic performance of fine-grained 1420 Al-Li alloy

作　　者：张艳苓[1] 郭和平[1] 李志强[1] 张西涛 李琪 

机构地区：[1]北京航空制造工程研究所金属成形技术研究室,北京100024 [2]海军驻阎良地区航空军代表室,西安710089

出　　处：《塑性工程学报》2009年第4期134-137,共4页Journal of Plasticity Engineering

摘　　要：文章以采用双级时效制度和转向轧制工艺制备的细晶1420铝锂合金为研究对象，通过恒应变速率超塑拉伸试验，研究了合金的单轴超塑拉伸性能。结果表明，在460℃-520℃温度条件下和1×10^-4s^-1～5×10^-3s^-1应变速率范围内，细晶1420铝锂合金表现出良好的超塑性，在温度460℃、应变速率1×10^-4s^-1条件下，延伸率达到650％。利用光学显微镜和透射电镜等检测手段，对超塑变形后材料的组织进行了观察和分析。The superplasticity of fine-grained 1420 Al-Li alloys which prepared by two-stage aging and turning rolling technology was studied by constant-strain-rate tensile test. The results show that： good superplasticity was attained at temperature range of 460℃-520℃ and deformation strain rate 1×10^-4s^-1～5×10^-3s^-1, and the tensile elongation 650% was obtained at the temperature of 460℃ and strain rate of 1×10^-4s^-1. Furthermore, the microstructures of after superplastic deformation were investigated by means of OM and TEM.

关 键 词：细晶1420铝锂合金 超塑性 延伸率 微观组织 

分 类 号：TG113[金属学及工艺—物理冶金]