ZE10镁合金板的超塑变形行为  

Superplastic Deformation Behavior of ZE10 Magnesium Alloy Sheet

作　　者：刘英[1] 李元元[2] 陈维平[2] 张大童[2] 李卫[1] 

机构地区：[1]暨南大学材料科学与工程系,广东广州510632 [2]华南理工大学金属新材料广东省重点实验室,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2006年第7期17-20,25,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(04300124);华南理工大学金属材料制备与成形广东省重点实验室开放基金资助项目(2005002)

摘　　要：为研究ZEl0镁合金板的超塑性能及超塑性变形过程中的组织演化特征，在200～400℃下以5．5×10^-4～2．2×10^-2s^-1的应变速率对ZE10镁合金板进行了高温拉伸试验，并对其微观组织进行了分析．结果表明：ZE10镁合金板在350和400℃拉伸时具有良好的超塑性．在350和400℃下以5．5×1014S“的应变速率拉伸，延伸率分别为227％和270％．ZE10镁合金板的原始晶粒大小为25～30μm，在超塑性变形过程中晶粒大小无显著变化，显微组织为等轴晶组织．超塑性试样拉断时，断口具有典型的空洞形貌特征．In order to investigate the superplasticity and the microstructure evolution during the superplastic deformation of ZE10 magnesium alloy sheet, the high-temperature tensile experiments of the sheet were carried out at the temperatures of 200 to 400 0（3 and at strain rates of 5.5 × 10^-4 to 2.2 × 10^- 2 s^-1 with the microstructure of the sheet being also analyzed. The results indicate that ZE10 magnesium alloy sheet possesses good superplasticity at 350 ℃ and 400 ℃, the corresponding elongations at the strain rate of 5.5 × 10^-4 s^-1 respectively reaching 227% and 270% , that the original average grain size-25 to 30 μm--of ZE10 magnesium alloy sheet scarcely changes during the superplastic deformation, that the microstructure maintains equiaxed-grain dynamically, and that there exist typical cavities on the fracture surface when the sheet is fractured.

关 键 词：ZE10镁合金 超塑性 微观结构 性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]