搅拌摩擦加工对AZ31镁合金微观组织及力学性能的影响  

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

作　　者：俞良良 张郑[1,2] 王快社[1,2] 王文[1,2] 贾少伟[1,2] YU Liangliang;ZHANG Zheng;WANG Kuaishe;WANG Wen;JIA Shaowei(College of Metallurgy Engineering,Xi’an University of Architecture and Technology,Xi’an 710055;National and Local Joint Engineering Research Center of Function Material Processing,Xi’an University of Architecture and Technology,Xi’an 710055)

机构地区：[1]西安建筑科技大学冶金工程学院,西安710055 [2]西安建筑科技大学功能材料加工国家地方联合工程研究中心,西安710055

出　　处：《材料导报》2018年第8期1289-1293,共5页Materials Reports

基　　金：国家自然科学基金(51574192;51274161;U1360105;51404180)

摘　　要：采用搅拌摩擦加工技术(Friction stir processing,FSP)对AZ31镁合金板材进行了单道次加工,研究了加工区域微观组织对力学性能的影响。结果表明,相同前进速度下,旋转速度升高,平均晶粒尺寸增大。搅拌摩擦加工后,晶粒尺寸和织构变化显著影响AZ31镁合金的力学性能,平均晶粒尺寸越大,越易发生孪生变形。织构类型主要包括基面织构和纤维织构。基面织构位于软位向时,屈服强度降低,但纤维织构会弱化基面织构对力学性能的影响。AZ31 magnesium alloy plates were fabricated by friction stir processing(FSP),and the microstructure and mecha-nical properties of the processed region were studied.The results showed that the average grain size increased as a result of increasing rotation speed under the same travelling speed.After FSP,grain size and texture affect the mechanical properties of AZ31 magnesium alloy significantly,the twin deformation would be more likely to occur with greater average grain size.Texture type mainly included basal plane texture and fiber texture,while the yield strength was lower when basal plane texture was in the soft orientation,but fiber texture would weaken the influence of basal plane texture of mechanical properties.

关 键 词：搅拌摩擦加工 AZ31镁合金 力学性能 晶粒尺寸 织构 

分 类 号：TG146[一般工业技术—材料科学与工程]