变形温度对TC4合金中温塑性变形行为的影响  

Effect of Deformation Temperature on Warm Deformation Behavior of TC4 Alloy

作　　者：杨新亮[1] 葛长健[1] 杨智[2] 

机构地区：[1]西北工业大学材料学院,陕西西安710072 [2]中国航空工业集团公司第一飞机设计院,陕西西安710089

出　　处：《热加工工艺》2012年第16期71-73,76,共4页Hot Working Technology

摘　　要：基于热模拟压缩试验,研究了变形温度对TC4合金中温塑性变形过程中流动行为和微观组织演变的影响。热模拟压缩试验参数为560～660℃、0.1～50.0 s-1。结果表明,随着变形温度的升高,TC4合金的流动应力逐渐降低;随着应变速率的升高,变形温度对TC4合金流动应力的影响幅度逐渐降低;TC4合金中温塑性变形时的温度敏感性指数随应变和应变速率的增加而降低;随变形温度的升高,TC4合金微观组织均匀程度提高,α晶粒逐渐清晰可辨。The warm compression test of TC4 alloy was carried out at the deformation temperatures ranging from 560 ℃ to 660 ℃ and strain rates ranging from 0.1 s-1 to 50.0 s-1 by the thermo-testing machine.The effects of deformation temperature on the deformation behavior and microstructure evolution of TC4 alloy were studied.The results show that the flow stress of TC4 alloy decreases with the increase of deformation temperature.The influence of deformation temperature on the flow stress of the alloy decreases with the increase of strain rate.The temperature sensitivity coefficient changes with strain and strain rate.The uniformity of microstructure in the alloy increases with the increase of deformation temperature.

关 键 词：TC4合金 变形温度 流动应力 微观组织 

分 类 号：TG113.25[金属学及工艺—物理冶金]