LY12CZ铝合金在强电场中的超塑性变形  

SUPERLASTIC DEFORMATION OF LY12CZ ALUMINUM ALLOY UNDER AN ELECTRIC FIELD

作　　者：李淼泉[1] 吴诗[1] 

机构地区：[1]西北工业大学四○二教研室

出　　处：《塑性工程学报》1996年第3期41-46,共6页Journal of Plasticity Engineering

基　　金：国家教委博士点基金

摘　　要：本文研究了未经预处理ＬＹ１２ＣＺ铝合金在强电场中超塑性变形时应变速率敏感性指数、板料厚向异性指数、激活能、极限延伸率的变化和超塑性单向拉伸时的流变应力特征。同时，研究了未经预处理ＬＹ１２ＣＺ铝合金在强电场中超塑性变形后材料的弹性模型、屈服强度、强度极限和断裂时的断面缩减率的变化。并将超塑性拉伸研究结果应用于未经预处理ＬＹ１２ＣＺ铝合金在强电场中的超塑性自由胀形，制作出了自由胀形零件，测量了相对极限胀形高度和零件相对厚度分布的变化。In this paper, the strain rate sensitivity index, coefficient of normal, activation energy, limit elongation and flow stress during superplastic deformation of LY12CZ aluminum alloy without any pretreatment under an external electric field have been investigated. Meanwhile, the modulus of elasticity, yield strength, ultimate tension strength and reduction in area at rupture after superplastic deformation have also been measured. Applying the results of superplastic uniaxial tension to the superplastically free bulging, the relative limt height and relative thickness of free bulging have been measured.

关 键 词：铝合金 电场 超塑性 变形 

分 类 号：TG146.21[一般工业技术—材料科学与工程]