工艺参数对半固态Al-4Cu -Mg合金力学行为的影响  

Effect of Process Parameters on Mechanical Behavior of Semi-solid Al-4Cu-Mg Alloy

作　　者：卢雅琳[1] 黄维超[1] 江海涛[1] 李淼泉[1] 

机构地区：[1]西北工业大学材料与科学工程学院

出　　处：《材料工程》2005年第5期11-14,共4页Journal of Materials Engineering

基　　金：西北工业大学博士创新基金资助项目(200210);江苏技术师范学院项目(KYY04040)

摘　　要：在热模拟实验的基础上,研究了各工艺参数对半固态和供应态Al4Cu Mg合金变形力学行为的影响。研究结果表明:在液固温度区间变形时,变形温度、应变速率对半固态和供应态Al4Cu Mg合金的流变应力峰值影响显著,对稳态流变应力影响较小。当变形温度超过某一临界值后,流变应力随变形温度的变化趋于稳定。在固相温度区间变形时,半固态与供应态材料流变应力的变化趋势基本一致,变形均为固相间的塑性变形。但供应态Al4Cu Mg合金的原始变形组织和半固态Al4Cu Mg合金的球状组织对变形的影响有所不同。Effects of deformation process parameters, including deformation temperature and the strain rate, on mechanical behavior of the semi-solid Al-4Cu-Mg alloy and the as-received were investigated through isothermal compression. The experimental results show that effects of deformation temperature and strain rate on peak stress of the Al-4Cu-Mg alloy are significant, and inappreciable on steady flow stress during the semi-solid state. Flow stress decreases with the increase of deformation temperature and the decrease of strain rate. The stress-strain curves of the semi-solid Al-4Cu-Mg alloy are similar to those of the as received at deformation temperature of 490°C. However, the semi-solid Al-4Cu-Mg alloy with spheroid grains and the as received alloy with irregular microstructure have different influence on mechanical behavior in the semi-solid state.

关 键 词：半固态 AL-4CU-MG合金 热压缩变形 力学行为 

分 类 号：TG146.2[一般工业技术—材料科学与工程]