Al-W合金粉末压制体热变形行为及本构方程  

Hot Deformation Behavior and Constitutive Equation for Powder Compaction Product of Aluminum-tungsten Alloy

作　　者：郭拉凤[1,2] 张治民[1] 薛勇[1] 李保成[1] 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]中北大学机电工程学院,山西太原030051

出　　处：《热加工工艺》2015年第6期67-69,73,共4页Hot Working Technology

基　　金：国家973研究专项(2012CB626808);山西省自然科学基金(2013011022-4);山西省研究生优秀创新项目(20133098)

摘　　要：采用Gleeble-1500热模拟试验机,在变形温度420~570℃、应变速率0.001~1s-1、最大变形程度60%的条件下,对Al-W合金粉末压制体进行热压缩试验。分析变形温度和应变速率对Al-W合金高温塑性变形应力的影响,计算出变形激活能为451.21k J/mol,并建立了Al-W合金本构方程。The hot compression test of powder compaction product of aluminum-tungsten alloy were performed with Gleeble-1500 thermal modeling tester under strain rate of 0.001-1s-1and deformation temperature of 420 ℃-570 ℃,and the deformation degree does not exceed 60%.The effects of deformation temperature and strain rate on the flow stress of aluminum-tungsten power alloy were analyzed.The activation energy during hot deformation is 451.21 k J/mol by calculation.And the constitutive equation of aluminum-tungsten alloy was established.

关 键 词：Al-W合金 变形温度 应变速率 流变应力 本构方程 

分 类 号：TG301[金属学及工艺—金属压力加工]