铝合金热塑性变形流动应力及其数学模型  

Mathematical Model on Flow Stress of Aluminium Alloys in Hot Plastic Deformation

作　　者：张少军[1] 周纪华[1] 高永生[1] 伦怡馨 王再英[1] 

机构地区：[1]北京科技大学机械工程学院

出　　处：《北京科技大学学报》1996年第3期263-266,共4页Journal of University of Science and Technology Beijing

基　　金：有色总公司"八五"科技攻关项目

摘　　要：采用恒应变速率凸轮式压缩试验机，测定了４种铝合金材料在热状态下的流动应力，分析了应变率、应变速率及变形温度对流动应力的影响规律，通过对多种结构型式流动应力数学模型的回归分析比较，确定了计算精度较高、结构型式较简单、适合于现场计算机在线控制和工程计算的数学模型。Using cam-type compression testing machine, four kinds of aluminium-alloy materials are tested in hot process at constant strain rate. The affects of strain, strain rate and deformation temperature on flow stress are analysed. By regressing,comparing and analysing various form of mathematical models of flow stress, one model with higher calculation accuracy, simpler form and more suitable for on-line computer control and engineering calculation is determined.

关 键 词：铝合金 塑性变形 流动应力 数学模型 热塑性变形 

分 类 号：TG146.21[一般工业技术—材料科学与工程]