ECAPT过程中TE工艺对ECAP变形规律的影响  

Effects of Subsequent TE Process on the Material Deformed by ECAP during ECAPT Process

作　　者：董飞[1] 华睿[1] 钱陈豪[1] 李萍[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《精密成形工程》2013年第5期9-12,共4页Journal of Netshape Forming Engineering

摘　　要：通过对纯铝等径角挤压(ECAP)和等径角挤扭(ECAPT)变形行为的数值模拟,获得了材料在不同工艺下的应变和损伤情况。结果表明,在ECAPT工艺中试样通过ECAP通道后能获得比单独的ECAP更高的应变累积,应变累积量随TE通道螺旋角β的增大而增大,同时试样内部的应变分布也得到改善,试样在受到TE工艺的背压后材料表面受到剪切破坏的可能性也明显降低。The distributions of the strain and damage of blank were obtained by the numerical simulation of equal channel angular pressing(ECAP) and equal channel angular pressing & torsion(ECAPT) with aluminum 1100.Results indicate that the blank through the ECAP channel in ECAPT accumulates more strains than those of the simple ECAP,and the value of the effective strain will increase with the helical angle β of TE channel increasing.What's more,the distribution of the strain of the part is more homogenous,and the possibility of the damage decreases obviously when the part is forced by the back pressure of TE.

关 键 词：等径角挤扭(ECAPT) 数值模拟 应变累积 

分 类 号：TG376[金属学及工艺—金属压力加工]