The effect of grain size distribution on the shape of flow stress curves of Mg-3Al-1Zn under uniaxial compression

被引：53
作者：
Choi, S. -H. [1 ]
Kim, J. K. [2 ]
Kim, B. J. [1 ]
Park, Y. B. [1 ]
机构：
[1] Sunchon Natl Univ, Dept Mat Sci & Met Engn, Sunchon 540742, Jeonnam, South Korea
[2] LS Cable, Elect Circuit Mat Res Inst, Jeongeup 580810, Jeonbuk, South Korea
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 488卷 / 1-2期
关键词：
flow stress curve; grain size; Mg alloys; peak stress; strain rate; twin bands;
D O I：
10.1016/j.msea.2007.11.071
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
To investigate the effect of initial microstructure oil the evolution of flow stress curves during plastic deformation, cylindrical specimens of two types of AZ31 Mg alloy with different grain size distributions were compressed in the rolling (RD) and normal directions (ND) at 300 degrees C. For specimens with a compression axis parallel to the RD, an AZ31 Mg alloy that had an inhomogeneous and coarse distribution of grain size exhibited more distinct twin-dominated plastic deformation and sigmoidal shape of the flow stress curve at higher strain rates. The AZ31 alloy having larger grain size showed more favorable for twin-dominated deformation at a given temperature and strain rate. The specimen deformed at a higher strain rate only exhibits twin-dominated deformation and has a large area fraction of grains deformed by propagation of twin bands (TB) through its parent grains (PG). (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：458 / 467
页数：10
相关论文
共 26 条
  • [1] Plastic anisotropy and the role of non-basal slip in magnesium alloy AZ31B
    Agnew, SR
    Duygulu, Ö
    [J]. INTERNATIONAL JOURNAL OF PLASTICITY, 2005, 21 (06) : 1161 - 1193
  • [2] Study of slip mechanisms in a magnesium alloy by neutron diffraction and modeling
    Agnew, SR
    Tomé, CN
    Brown, DW
    Holden, TM
    Vogel, SC
    [J]. SCRIPTA MATERIALIA, 2003, 48 (08) : 1003 - 1008
  • [3] Application of texture simulation to understanding mechanical behavior of Mg and solid solution alloys containing Li or Y
    Agnew, SR
    Yoo, MH
    Tomé, CN
    [J]. ACTA MATERIALIA, 2001, 49 (20) : 4277 - 4289
  • [4] Deformation microstructures and textures of some cold rolled Mg alloys
    Barnett, MR
    Nave, MD
    Bettles, CJ
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 386 (1-2): : 205 - 211
  • [5] Influence of grain size on hot working stresses and microstructures in Mg-3Al-lZn
    Barnett, MR
    Beer, AG
    Atwell, D
    Oudin, A
    [J]. SCRIPTA MATERIALIA, 2004, 51 (01) : 19 - 24
  • [6] Influence of grain size on the compressive deformation of wrought Mg-3Al-1Zn
    Barnett, MR
    Keshavarz, Z
    Beer, AG
    Atwell, D
    [J]. ACTA MATERIALIA, 2004, 52 (17) : 5093 - 5103
  • [7] Influence of initial microstructure on the hot working flow stress of Mg-3Al-1Zn
    Beer, A. G.
    Barnett, M. R.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 423 (1-2): : 292 - 299
  • [8] The role of texture, temperature, and strain rate in the activity of deformation twinning
    Brown, DW
    Agnew, SR
    Abeln, SP
    Blumenthal, WR
    Bourke, MAM
    Mataya, MC
    Tomé, CN
    Vogel, SC
    [J]. ICOTOM 14: TEXTURES OF MATERIALS, PTS 1AND 2, 2005, 495-497 : 1037 - 1042
  • [9] Internal strain and texture evolution during deformation twinning in magnesium
    Brown, DW
    Agnew, SR
    Bourke, MAM
    Holden, TM
    Vogel, SC
    Tomé, CN
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 399 (1-2): : 1 - 12
  • [10] Simulation of deformation twins and deformation texture in an AZ31 Mg alloy under uniaxial compression
    Choi, S.-H.
    Shin, E. J.
    Seong, B. S.
    [J]. ACTA MATERIALIA, 2007, 55 (12) : 4181 - 4192
123