6082铝合金冷塑性流变行为及数值模拟研究  

Research on cold plastic flow behavior and numerical simulation of6082 aluminum alloy

作　　者：张志强 龚红英[1] 周志伟 叶恒昌 赵江波 ZHANG Zhi-qiang;GONG Hong-ying;ZHOU Zhi-wei;YE Heng-chang;ZHAO Jiang-bo(School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《塑性工程学报》2024年第6期141-148,共8页Journal of Plasticity Engineering

基　　金：上海工程技术大学校企产学合作项目((19)CL-041);上海工程技术大学高水平高峰学科项目。

摘　　要：进行了常温单向拉伸试验、硬度测试和金相试验,研究了6082铝合金冷塑性变形行为。通过对拉伸后试样的断后伸长率和断面收缩率进行研究发现,随着拉伸速率的增大,两者先增大后减小。通过扫描电镜(SEM)分析,发现6082铝合金的断口形貌呈现出韧窝-脆面混合断裂的模式,并且在高速拉伸时出现大量破碎的硬脆相。对6082铝合金拉伸试验得到的数据进行分析并建立了优化本构方程,结合有限元数值模拟试验分析,将所建立的优化后的材料本构模型输入有限元软件中进行模拟验证,两者相对误差为1.33%,说明建立的模型可以准确描述6082材料在冷塑性变形状态下的硬化行为。The cold plastic deformation behaviors of 6082 aluminum alloy were studied by uniaxial tensile test,hardness test and metallographic test.The elongation after fracture and reduction of area of the tensile samples were studied,it is found that both factors increase first and then decrease with the increase of tensile rate.Scanning electron microscopy(SEM)analysis exposes that the fracture morphology in 6082 aluminum alloy exhibites mixed ductile-brittle fracture mode,with a significant presence of broken hard and brittle phases under high-speed tension.The optimized constitutive equation was developed through the thorough analysis of the data acquired from the tensile tests for 6082 aluminum alloy.The optimized material constitutive model was integrated into finite element software for verification,applying finite element numerical simulation test analysis methods.The relative error of 1.33%is obtained in the verification process,indicating that the established model is capable of accurately describing the hardening behavior of 6082 materials during cold plastic deformation.

关 键 词：6082铝合金 本构模型 冷成形 有限元 单向拉伸 

分 类 号：TG379[金属学及工艺—金属压力加工]