喷射成形2195铝锂合金的热变形行为和热加工图  

Hot Deformation Behavior and Hot Processing Diagram of Spray Forming 2195 Al-Li Alloy

作　　者：徐桂芳[1] 龙江馨 XU Guifang;LONG Jiangxin(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《热加工工艺》2021年第19期90-93,98,共5页Hot Working Technology

基　　金：工信部民用飞机专项项目(MJZ-2016-G-68)。

摘　　要：在变形温度300~460℃和应变速率0.01~5 s^(-1)下,采用Gleeble3500热模拟机对喷射成形2195铝锂合金进行了高温热压缩试验。研究了该合金热变形过程中高温流动行为,利用线性回归方法拟合了峰值应力、应变速率以及变形温度间的本构关系,得到了变形激活能。结果表明:合金的变形激活能为155.049 kJ/mol,有效热加工窗口为410~460℃和0.01~0.5 s^(-1)。The high temperature thermal compression test of the spray forming 2195 Al-Li alloy was carried out by Gleeble3500 thermal simulator at deformation temperature of 300-460 ℃and strain rate of 0.01-5 s^(-1). The high temperature flow behavior of the alloy during thermal deformation was studied. The constitutive relationship between peak stress, strain rate and deformation temperature was fitted by linear regression method, and the deformation activation energy was obtained.The results show that the deformation activation energy of the alloy is 155.049 kJ/mol, and the effective hot working window is 410-460 ℃ and 0.01-0.5 s^(-1).

关 键 词：2195铝锂合金 热变形 流动应力 热加工图 

分 类 号：TG379[金属学及工艺—金属压力加工]