多向锻造对AZ40镁合金组织和力学性能的影响  

Effect of multidirectional forging on microstructure and properties of AZ40 magnesium alloy

作　　者：支盛兴 袁家伟 李兴刚[1,2,3] 石国梁 李永军[1,2,3] 马鸣龙 张奎[1,2,3] 蒲治军 曾孝云[4] 刘俊 兰成均[4] 郝爱国 ZHI Sheng-xing;YUAN Jia-wei;LI Xing-gang;SHI Guo-liang;LI Yong-jun;MA Ming-long;ZHANG Kui;PU Zhi-jun;ZENG Xiao-yun;LIU Jun;LAN Cheng-jun;HAO Ai-guo(State Key Laboratory of Nonferrous Metals and Process,GRINM Group Corpration Limited(GRINM),Beijing 100088,China;GRIMAT Engineering Institute Co Ltd,Beijing 101407,China;General Research Institute for Nonferrous Metals,Beijing 100088,China;Institute of Machinery Manufacturing Technology,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]有研科技集团有限公司有色金属材料制备加工国家重点实验室,北京100088 [2]有研工程技术研究院有限公司,北京101407 [3]北京有色金属研究总院,北京100088 [4]中国工程物理研究院机械制造工艺研究所,四川绵阳621900

出　　处：《材料热处理学报》2020年第9期132-138,共7页Transactions of Materials and Heat Treatment

摘　　要：采用多向锻造(MDF)对Mg-4Al-1Zn-0.5Mn合金进行塑性变形,利用光学显微镜和电子背散射衍射(EBSD)等分析了合金的组织与织构。结果表明:随着锻造道次的增加,合金中的小角度晶界比例减少,大角度晶界有所增加,晶粒细化,织构有所改变,织构强度降低,各向异性减弱,径向力学性能提高。经过6道次锻造后合金的径向晶粒最细,径向塑性最高。The plastic deformation of Mg-4 Al-1 Zn-0.5 Mn alloy was carried out by multidirectional forging(MDF),and microstructure and texture of the alloy after MDF for different passes were analyzed by means of optical microscope and electron backscattered diffraction(EBSD)technique.The results show that with the increase of forging pass,the proportion of small angle grain boundary of the alloy decreases,the large angle grain boundary increases,the grain is refined,the texture changes,the texture strength decreases,the anisotropy decreases,and the radial mechanical properties increase.After multidirectional forging for 6 passes,the radial grain size of the alloy is the smallest and the radial plasticity is the highest.

关 键 词：Mg-4Al-1Zn-0.5Mn合金 多向锻造 织构 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]