Microstructural evolution and age-hardening behavior of quasicrystal-reinforced Mg-Dy-Zn alloy

被引：8
作者：
Bi, Guang-Li [1 ,2 ]
Han, Yu-Xiang [1 ,2 ]
Jiang, Jing [1 ,2 ]
Jiang, Chun-Hong [1 ,2 ,3 ]
Li, Yuan-Dong [1 ,2 ]
Ma, Ying [1 ,2 ]
机构：
[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
[2] Lanzhou Univ Technol, Minist Educ, Key Lab Nonferrous Met Alloys & Proc, Lanzhou 730050, Gansu, Peoples R China
[3] Lanshi Foundry Co Ltd, Lanzhou 730050, Gansu, Peoples R China
来源：
RARE METALS | 2019年 / 38卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Mg-Dy-Zn alloy; Microstructure; I phase; Age-hardening behavior; MECHANICAL-PROPERTIES; AS-CAST; W-PHASE; GRAIN-REFINEMENT; HIGH-STRENGTH; Y ALLOY; I-PHASE; TRANSFORMATIONS; ND;
D O I：
10.1007/s12598-018-1089-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microstructural evolution and age-hardening behavior of Mg-2Dy-6Zn (at%) alloy during solid-solution and aging treatment were investigated. The microstructure of as-cast alloy is composed of -Mg, Mg3DyZn6 (I) phase, Mg3Dy2Zn3 (W) phase, Mg(Zn,Dy) phase and a small amount of Mg0.97Zn0.03 phases. After solid-solution treatment (480 degrees C, 12h), all the I phases and most W phases dissolve into -Mg matrix and the remainder W phases transform into Mg(Dy,Zn) phase and MgDy3 phase. During aging treatment, I phase and small amounts of W phases co-precipitate from -Mg matrix, respectively. The alloy exhibits a peak hardness of HV 77.5 at 200 degrees C for 8h. The excellent age-hardening behavior of alloy is mainly attributed to the co-precipitation strengthening of I and W phases.
引用
收藏
页码：739 / 745
页数：7
相关论文
共 34 条
  • [1] High strength Mg-Zn-Y alloy containing quasicrystalline particles
    Bae, DH
    Kim, SH
    Kim, WT
    Kim, DH
    [J]. MATERIALS TRANSACTIONS, 2001, 42 (10) : 2144 - 2147
  • [2] Deformation behavior of an extruded Mg-Dy-Zn alloy with long period stacking ordered phase
    Bi, Guangli
    Li, Yuandong
    Huang, Xiaofeng
    Chen, Tijun
    Lian, Jianshe
    Jiang, Zhonghao
    Ma, Ying
    Hao, Yuan
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 622 : 52 - 60
  • [3] Double-peak ageing behavior of Mg-2Dy-0.5Zn alloy
    Bi, Guangli
    Fang, Daqing
    Zhao, Lei
    Zhang, Qingxin
    Lian, Jianshe
    Jiang, Qing
    Jiang, Zhonghao
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (32) : 8268 - 8275
  • [4] Grain refinement and improved age hardening of Mg-Zn alloy by a trace amount of V
    Buha, J.
    [J]. ACTA MATERIALIA, 2008, 56 (14) : 3533 - 3542
  • [5] Effects of Zn content on microstructures and mechanical properties of Mg-Zn-RE-Sn-Zr-Ca alloys
    Chen, T. J.
    Zhang, D. H.
    Wang, W.
    Ma, Y.
    Hao, Y.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 607 : 17 - 27
  • [6] Effects of Nd or Zr Addition on Microstructure and Mechanical Properties of As-Cast Mg-Zn-Y Alloy
    Chen, Ti Jun
    Zhang, Da Hua
    Wang, Wei
    Ma, Ying
    Hao, Yuan
    [J]. MATERIALS TRANSACTIONS, 2016, 57 (08) : 1287 - 1295
  • [7] Chen TJ, 2015, CHINA FOUNDRY, V12, P339
  • [8] Microstructure evolution and mechanical properties of quasicrystal-reinforced Mg-Zn-Y alloy subjected to ultrasonic vibration
    Fang, Xiaogang
    Wu, Shusen
    Lu, Shulin
    Wang, Jing
    Yang, Xiong
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 679 : 372 - 378
  • [9] Microstructure transformations in the heat-treated Mg-Zn-Y alloy
    Geng, Jiwei
    Teng, Xinying
    Zhou, Guorong
    Zhao, Degang
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2013, 577 : 498 - 506
  • [10] Secondary phases in quasicrystal-reinforced Mg-3.5Zn-0.6Gd Mg alloy
    Huang, Hua
    Tian, Yuan
    Yuan, Guangyin
    Chen, Chunlin
    Wang, Zhongchang
    Ding, Wenjiang
    Inoue, Akihisa
    [J]. MATERIALS CHARACTERIZATION, 2015, 108 : 132 - 136
1234