高强AZ61Mg‒18%Ti复合材料的制备及力学性能  

Fabrication and mechanical properties of high-strength AZ61Mg‒18%Ti composites

作　　者：张小红[1] 于欢 胡连喜[4] ZHANG Xiao-hong;YU Huan;HU Lian-xi(Teaching Administration Office,Wuxi Institute of Technology,Wuxi 214121,China;Key Laboratory for High Strength Lightweight Metallic Materials of Shandong Province,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;Advanced Materials Institute,Shandong Academy of Sciences,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]无锡职业技术学院教务处,无锡214121 [2]齐鲁工业大学(山东省科学院)山东省轻质高强金属材料省级重点实验室,济南250014 [3]齐鲁工业大学(山东省科学院)山东省科学院新材料研究所,济南250014 [4]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《粉末冶金技术》2021年第6期532-536,共5页Powder Metallurgy Technology

基　　金：国家自然基金资助项目(51374085)。

摘　　要：通过机械球磨、真空热压和热挤压制备了AZ61Mg‒18%Ti(质量分数)复合材料,研究了复合材料的微观组织、室温力学性能和强化机制。结果表明,采用真空热压+热挤压制备的复合材料镁基体平均晶粒尺寸为180 nm,Ti颗粒及纳米级Ti_(3)Al相弥散分布于镁基体中,Ti颗粒和Ti_(3)Al相平均尺寸分别为265 nm和10 nm。超细晶AZ61Mg‒18%Ti复合材料具有优异的室温力学性能,其屈服强度、抗压强度和断裂应变分别达到606 MPa、698 MPa和12%。The AZ61Mg‒18%Ti(mass fraction)composites were prepared by mechanical milling,vacuum hot pressing,and hot extrusion.The microstructure,room-temperature mechanical properties,and the corresponding strengthening mechanism were studied.The results show that,the average grain size of the magnesium matrix is about 180 nm,the Ti particles and the nano-sized Ti_(3)Al phases are dispersive distribution in the magnesium matrix,and the average grain sizes of Ti particles and Ti_(3)Al phases are 265 nm and 10 nm,respectively.The ultrafine-grained AZ61Mg‒18%Ti composites show the excellent room-temperature mechanical properties,the room-temperature yield strength,the compressive strength,and the fracture strain are 606 MPa,698 MPa,and 12%,respectively.

关 键 词：镁基复合材料 机械球磨 真空热压 热挤压 弥散强化 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]