摘要
文章主要对异步轧制AZ31镁合金板材室温冲压性能进行了研究,以探讨提高镁合金板材冲压性能的途径。结果表明,异步轧制有利于板材的晶粒细化,其晶粒尺寸约为7.6μm,明显小于普通轧制板材的12.5μm;而由于异步轧制过程中剪切变形的作用,异步轧制使板材的(0002)基面晶粒取向减弱;与普通轧制相比,异步轧制板材的应变硬化能力增加,屈服强度降低,制耳参数减小,但塑性应变比也降低,这可归因于异步轧制所导致的晶粒细化和晶粒取向的改变。
The objective of this study is to investigate the method of improved drawability of AZ31 magnesium alloy sheet produced by differential speed rolling process at room temperature. The grain size of AZ31 magnesium alloy sheet was 7. 6μm, which was smaller obviously than that of 12.5μm processed by normal rolling. And （0002） basal grain orientation of AZ31 magnesium alloy sheet produced by differential speed rolling was weakened, which was owing to the shear deformation induced by this process. Compared with the normal rolling, the higher strain hardening exponent, lower yield ratio, decreasing earing parameter and plastic strain ratio could be related to the grain refinement and changing grain orientation, which induced by the differential speed rolling.
出处
《塑性工程学报》
EI
CAS
CSCD
北大核心
2007年第4期6-10,共5页
Journal of Plasticity Engineering
基金
湖南省教育厅科研资助项目(06C031)。
关键词
异步轧制
AZ31镁合金板材
冲压性能
变形行为
differential speed rolling
AZ31 magnesium alloy sheet
drawability
deformation behavior
