CAJ | 학술논문

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~(-4)s~(-1)～5×10~(-3)s~(-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~(-4)s~(-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.
문장이채용쌍급시효제도화전향알제공예제비적세정1420려리합금위연구대상,통과항응변속솔초소랍신시험,연구료합금적단축초소랍신성능.결과표명,재460℃～520℃온도조건하화1×10~(-4)s~(-1)～5×10~(-3)s~(-1)응변속솔범위내,세정1420려리합금표현출량호적초소성,재온도460℃、응변속솔1×10~(-4)s~(-1)조건하,연신솔체도650%.이용광학현미경화투사전경등검측수단,대초소변형후재료적조직진행료관찰화분석.
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~(-4)s~(-1)～5×10~(-3)s~(-1), and the tensile elongation 650 ～ was obtained at the tem-perature of 460℃ and strain rate of 1×10~(-4)s~(-1). Furthermore, the microstructures of after superplastic deformation were investi-gated by means of OM and TEM.