摘要
以AZ31镁合金为研究对象,对其进行了双向挤压与等通道复合变形模型的数值模拟计算,分析了模具转角对金属流动状态、等效应力、应变与挤压力的影响,并定量的分析了等效应变分布的不均匀程度。结果表明:AZ31镁合金经过双向挤压与等通道复合变形后发生了剧烈的塑性变形,应力主要集中在模具转角剪切区,且能有效的获得高的均匀等效应变值。
Numerical simulation calculation was carried out on the model of dual-directional and equal channel angular compound extrusion of AZ31 magnesium alloy.Effects of die corner on the metal flow state,equivalent strain and load-stroke were analyzed.Moreover,the non-uniformity of the equivalent strain distribution was analyzed quantitatively.The results show that severe plastic deformation occurs in the AZ31 magnesium alloy subjected to dual-directional and equal channel angular compound extrusion,and stress is mainly concentrated on shear zone of the die corner.Besides,homogeneous equivalent strain with high value can be achieved effectively by the compound extrusion.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第7期198-204,共7页
Transactions of Materials and Heat Treatment
基金
湖南省自然科学基金资助项目(14JJ3111)
校博士科研启动基金(E51353)
湖南省自然科学湘潭联合基金项目(12JJ9011)
关键词
AZ31镁合金
有限元模拟
复合挤压
模具转角
AZ31 magnesium alloy
finite element simulation
compound extrusion
die corner
