搅拌摩擦加工铸态AZ31镁合金组织性能研究

稀有金属材料与工程, 2012, 41(9): 1522-1526.

搅拌摩擦加工铸态AZ31镁合金组织性能研究

王文 ^1, , 王快社 ^2, , 郭强 ^3, , 吴楠 ^4,

1.西安建筑科技大学,陕西西安710055

2.西安建筑科技大学,陕西西安710055

3.西安建筑科技大学,陕西西安710055

4.西安建筑科技大学,陕西西安710055

基金项目: Xi'an Science and Technology Project (CXY1124(4)) National Natural Science Foundation of China(51074119)

关键词：搅拌摩擦加工 , 铸态AZ31镁合金 , 微观组织 , 力学性能

Effect of Friction Stir Processing on Microstructure and Mechanical Properties of Cast AZ31 Magnesium Alloy

Wang Wen ^1, , Wang Kuaishe ^2, , Guo Qiang ^3, , Wu Nan ^4,

1.西安建筑科技大学,陕西西安710055

2.西安建筑科技大学,陕西西安710055

3.西安建筑科技大学,陕西西安710055

4.西安建筑科技大学,陕西西安710055

Keywords： friction stir processing , cast AZ31 magnesium alloy , microstructure , mechanical properties

对铸态AZ31镁合金进行单道次和双道次搅拌摩擦加工,对其微观组织和力学性能进行研究.结果表明:铸态AZ31镁合金搅拌摩擦加工后,共晶网状β-Mg17Al12相破碎并发生固溶,微观组织显著细化和均匀化.AZ31镁合金母材和单道次搅拌摩擦加工后的试样没有择优取向,而双道次搅拌摩擦加工后的试样存在择优取向,其(0002)基平面与试样表面平行.单道次和双道次搅拌摩擦加工后试样的抗拉强度分别提高了43和82MPa,延伸率提高了4.3％和11.9％.搅拌摩擦加工后试样的拉伸断口表现为韧性断裂特征.

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