5083铝合金高温流变本构关系研究  

Constitutive Equation of Rheological Properties for 5083 Aluminum Alloy at Elevated Temperature

作　　者：徐清波[1] 陶友瑞[2,3] 米芳[3] 

机构地区：[1]湘潭大学机械学院,湖南湘潭411100 [2]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [3]湖南工程学院机械工程学院,湖南湘潭411100

出　　处：《矿冶工程》2013年第5期124-126,共3页Mining and Metallurgical Engineering

基　　金：湖南省自然科学基金资助(12JJ9017);湖南大学汽车车身先进设计制造国家重点实验室开放基金资助(31115014);中国博士后基金资助(2013M542105)

摘　　要：采用动态热模拟技术进行高温压缩变形试验,分析了5083铝合金的流变行为,建立了该材料的高温流变应力模型。结果表明:应变速率和变形温度显著影响5083铝合金流变应力,流变应力随变形温度升高而降低,随应变速率提高而增大,在高应变速率下出现明显的动态软化。Dynamic thermal simulation technology was introduced to a high-temperature compression deformation test to investigate theological behavior of 5083 aluminum alloy at elevated temperature and establish a high temperature flow stress model. Results show that flow stress is apparently influenced by both strain rate and deformation temperature, as the flow stress decreases with the increased temperature, while increases with the raise of strain rate. An apparent dynamic softening can be observed at a high strain rate.

关 键 词：5083铝合金 热压缩变形 高温流变应力 本构方程 

分 类 号：TG146.2[一般工业技术—材料科学与工程]