6082铝合金变形性能与数值模拟的研究  

Study on Deformation Properties and Numerical Simulation of 6082 Aluminum Alloy

作　　者：张杰[1] 龚红英[1] 缪军[1] 吕弘毅[1] 孙士强 唐天山 ZHANG Jie;GONG Hongying;MIAO Jun;LYU Hongyi;SUN Shiqiang;TANG Tianshan(College of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;AnhuiJinsheng Automobile Industry Co.,Ltd.,Xuancheng 242000,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]安徽锦晟汽车工业有限公司,安徽宣城242000

出　　处：《热加工工艺》2019年第13期116-119,123,共5页Hot Working Technology

基　　金：技术开发校企合作项目(CL-027)

摘　　要：采用Gleeble-3800热模拟试验机研究了变形温度350~500℃和应变速率0.01~5s^-1下6082铝合金的热变形行为。结果表明:在同一应变速率下,稳态流动应力随着变形温度的升高而降低,动态回复作用大于加工硬化对应力的影响;在同一变形温度下,流动应力随着应变速率增大而增大。借助Origin软件对数据进行了回归分析,构建了6082铝合金的本构方程,并统计计算了本构方程预测流动应力值和试验值之间的平均相对误差。结果表明:平均相对误差值为0.11,本构方程能够较为准确预测材料高温流动应力随变形量增加而变化的大小和趋势。最后利用Deform-3D软件进行了热压缩试验模拟,发现模拟结果与实际结果有差异,分析了结果偏差的原因。The thermal deformation behavior of 6082 aluminum alloy at 350-500 ℃ and strain rate of 0.01-5 s^-1 was studied by using Gleeble-3800 thermal simulator. The results show that at the same strain rate, the steady flow stress decreases with the increase of deformation temperature, and the effect of dynamic recovery is greater than that of work hardening on stress;at the same deformation temperature, the flow stress increases with the strain rate increasing. The regression analysis of the data was carried out with the Origin software. The constitutive equation of 6082 aluminum alloy was constructed and the average relative error between the flow stress value predicted by the constitutive equation and the test value was calculated.The results show that the average relative error is 0.11, and the constitutive equation can accurately predict the magnitude and trend of the flow stress changing with the increase of deformation at high temperature. Finally, the thermal compression test was simulated by using Deform-3 D software. It is found that there is a difference between the simulation results and the actual results, and the reasons for the deviation of the results were analyzed.

关 键 词：6082铝合金 热压缩 流动性能 本构方程 Deform-3D软件 

分 类 号：TG319[金属学及工艺—金属压力加工] TG146.21[一般工业技术—材料科学与工程]