中北大学学报（自然科学版）2018，Vol.39Issue(4)：479-482,4.DOI:10.3969/j.issn.1673-3193.2018.04.019
挤压态AZ31镁合金室温拉伸力学各向异性研究
Research on Mechanical Anisotropy of Extruded AZ31 Magnesium Alloy in Tensile Condition at Room Temperature
摘要
Abstract
Study the mechanical behavior of tensile anisotropic in extruded AZ31 magnesium alloy based on three-way tensile testing.at room temperature,the mechanism of macroscopic tensile anisotropy in extruded magnesium was analyzed from the perspective of the microscopic deformation mechanism.The results show that,basal slip is the dominant deformation mechanism in the early stage of plastic deform-ation along three tensile directions in extruded magnesium alloy,but the corresponding Schmid factor of basal slip is different which results that obtaining the same shear stress needs to be applied to different macroscopic external stress,which eventually leads to the anisotropy of yield strength in the three-way sampling tensile.With the increase of strain,the dominant deformation mechanism of 0°tensile becomes prismatic slip,while 45°and 90°tensile deformation mechanism is still the dominant basal slip,which leads to the flow stress of 0°tensile is much higher than 45 and 90 progress in the late stage of deforma-tion.All in all,fiber texture of extruded magnesium alloy determines that the relative activity deforma-tion and the deformation resistance are different when the tensile deformation is in different directions, which leads to the anisotropy of the macroscopic tensile mechanical properties.关键词
AZ31镁合金/各向异性/变形机制/孪生Key words
AZ31 magnesium alloy/anisotropy/deformation mechanism/twinning分类
矿业与冶金引用本文复制引用
林金保,王心怡,任伟杰,李倩..挤压态AZ31镁合金室温拉伸力学各向异性研究[J].中北大学学报（自然科学版）,2018,39(4):479-482,4.基金项目
国家自然科学基金联合基金资助项目(51574171) （51574171）
山西省自然科学基金资助项目(201601D011012,2015011002) （201601D011012,2015011002）
