王忠堂,宋广胜,张士宏,孙瑞

• 1:沈阳理工大学材料科学与工程学院
• 2:沈阳航空航天大学材料科学与工程学院
• 3:中国科学院金属研究所

摘要(Abstract)：

采用异步轧制(AR)工艺和同步轧制(NR)工艺制备了AZ31镁合金板材,分析了AZ31镁合金板材的组织性能和力学性能,研究了轧制过程中孪晶组织和织构的演变规律,以及异步轧制工艺参数对镁合金板材组织、织构和力学性能的影响。结果表明,在压下量为3%~15%的范围内,异步轧制与同步轧制板材在晶粒尺寸以及均匀性上有相似的变化趋势。在变形初期,随压下量的增加,孪晶数量不断增加,孪晶使异步轧制与同步轧制板材中晶粒取向都发生偏转,即C轴趋向于垂直于法向(ND),从而使初始挤压板材的丝织构强度减弱;当压下量达到24%时孪晶大量减少或消失。在压下量为3%~24%的范围内,同步轧制对板材力学性能的影响并不明显,峰值应变呈交替性变化,异步轧制板材在压下量达到24%时,表现出了良好的塑性变形能力,抗拉强度达到309 MPa,峰值应变达到16.3%。

关键词(KeyWords)： AZ31;镁合金;异步轧制;孪晶组织;织构

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51174189)

作者(Author): 王忠堂,宋广胜,张士宏,孙瑞

DOI: 10.13289/j.issn.1009-6264.2013.10.013

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