晶须增强铝基复合材料的热压缩变形行为研究  

Deformation Behavior of Aluminum Matrix Composite Enhanced by Whisker in Thermal Compression Process

作　　者：全雪峰[1,2] 常梦星[2] 

机构地区：[1]兰州交通大学,甘肃兰州730070 [2]南阳医学高等专科学校,河南南阳473000

出　　处：《铸造技术》2014年第2期260-262,共3页Foundry Technology

摘　　要：研究了2vol%Mg2B2O5w/6061铝合金复合材料在热变形过程中,不同变形温度、应变速率下流变应力的变化,并通过计算机拟合建立了热压缩变形本构方程。结果表明,压缩变形过程中复合材料的流变应力随着变形温度的升高而降低,随着应变速率的增大而升高。当应变速率在0.01~1.00/s之间时,材料呈现出动态回复特征。复合材料在热变形过程中的应变速率和流变应力关系符合双曲正弦函数关系。The flow stress variations of 2vol% Mg2 B2 O5 w/6061 aluminum alloy composite in thermal compression under different deformation temperatures and strain rates were investigated, and the constitutive equation in the compression process was established by computer fitting. The results show that the flow stress decreases with the increase of the deformation temperature, and increases with the increase of the stain rate in the thermal compression process. When the strain rate is the scale of 0.01~1.00/s, a dynamic recovery characteristic appears. And the dependence of stain rate on flow stress is agreed with a sinh function in the thermal deformation process.

关 键 词：晶须增强 铝基复合材料 流变应力 本构方程 

分 类 号：TG146.21[一般工业技术—材料科学与工程]