Effects of microstructure on creep behavior of Mg-5%Zn-2%Al(-2%Y) alloy

被引：9
作者：
Zou Hong-hui [1 ]
机构：
[1] Gen Res Inst Nonferrous Met, Beijing 100088, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2008年 / 18卷 / 03期
关键词：
Mg alloy; microstructure; creep deformation; Mg-Zn phase; dynamic precipitation;
D O I：
10.1016/S1003-6326(08)60101-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Creep tests of Mg-5%Zn-2%Al(-2%Y) (mass fraction) alloy were carried out at 175 degrees C under the load of 50 MPa, on the cast and solution condition, respectively. Relationship between the creep behavior and microstructure was studied by the optical microscopy, SEM and TEM. The result shows that the primary creep strain is relative to the then-no-stability and the quantity of intermetallic compounds in grain boundary area. During the secondary creep period, the minimum creep rate of solution-treated specimens is substantially decreased as a result of dynamic MgZn2 precipitation.
引用
收藏
页码：580 / 587
页数：8
相关论文
共 19 条
  • [1] BROWN R, 1992, LIGHT MET AGE, V50, P18
  • [2] TRANSMISSION ELECTRON MICROSCOPY STUDY OF AGE HARDENING IN A MG-5 WT PER CENT ZN ALLOY
    CLARK, JB
    [J]. ACTA METALLURGICA, 1965, 13 (12): : 1281 - &
  • [3] Kim SH, 1997, MAT SCI ENG A-STRUCT, V226, P1030
  • [4] Effect of Y, Sr, and Nd additions on the microstructure and microfracture mechanism of squeeze-cast AZ91-X magnesium alloys
    Lee, S
    Lee, SH
    Kim, DH
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (04): : 1221 - 1235
  • [5] MAGERS D, 1997, LIGHT MET AGE, V55, P60
  • [6] Magnesium - Properties - applications - potential
    Mordike, BL
    Ebert, T
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 302 (01): : 37 - 45
  • [7] Microstructural stability and creep of rare-earth containing magnesium alloys
    Moreno, IP
    Nandy, TK
    Jones, JW
    Allison, JE
    Pollock, TM
    [J]. SCRIPTA MATERIALIA, 2003, 48 (08) : 1029 - 1034
  • [8] Microstructural characterization of a die-cast magnesium-rare earth alloy
    Moreno, IP
    Nandy, TK
    Jones, JW
    Allison, JE
    Pollock, TM
    [J]. SCRIPTA MATERIALIA, 2001, 45 (12) : 1423 - 1429
  • [9] Effects of precipitate shape and orientation on dispersion strengthening in magnesium alloys
    Nie, JF
    [J]. SCRIPTA MATERIALIA, 2003, 48 (08) : 1009 - 1015
  • [10] Powell BR, 2001, MAGNESIUM TECHNOLOGY 2001, P175
12