Deformation and fracture during equal channel angular pressing of AZ31 magnesium alloy

被引：84
作者：
Kang, Feng [1 ]
Wang, Jing Tao [1 ]
Peng, Yong [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Dept Mat Sci & Engn, Nanjing 210094, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 487卷 / 1-2期
关键词：
equal channel angular pressing; AZ31 magnesium alloy; shear fracture; flow localization;
D O I：
10.1016/j.msea.2007.09.063
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The deformation and fracture characteristics of AZ31 magnesium alloy during equal channel angular pressing (ECAP) were established. The isothermal behavior of AZ31 magnesium alloy was determined at temperatures between 150 and 250 degrees C and rain speeds producing average effective strain rates between 0.001 and 0.25 s(-1). AZ31 magnesium alloy was particularly susceptible to shear localization during ECAP, uniform flow occurred only at high temperatures and low strain rates. Observations of shear banding and shear fracture were interpreted in terms of the tendency for strain concentration as quantified by the flow localization 'alpha' parameter, or the ratio of the normalized flow softening rate to the strain-rate sensitivity. These understandings of the effect of material properties on flow localization tendency are helpful for the selection of processing parameters with uniform flow during ECAP. (C) 2007 Elsevier B.V. All rights reserved.
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收藏
页码：68 / 73
页数：6
相关论文
共 21 条
  • [1] Agnew SR, 2001, MAGNESIUM TECHNOLOGY 2001, P243
  • [2] COCKCROFT MG, 1968, J I MET, V96, P33
  • [3] COCKCROFT MG, 1966, 240 NEL
  • [4] Finite-element modeling of nonisothermal equal-channel angular extrusion
    DeLo, DP
    Semiatin, SL
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1999, 30 (05): : 1391 - 1402
  • [5] Failure modes during equal channel angular extrusion of aluminum alloy 2024
    Fagin, PN
    Brown, JO
    Brown, TM
    Jata, KV
    Semiatin, SL
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2001, 32 (07): : 1869 - 1871
  • [6] The processing of difficult-to-work alloys by ECAP with an emphasis on magnesium alloys
    Figueiredo, Roberto B.
    Cetlin, Paulo R.
    Langdon, Terence G.
    [J]. ACTA MATERIALIA, 2007, 55 (14) : 4769 - 4779
  • [7] The development of superplastic ductilities and microstructural homogeneity in a magnesium ZK60 alloy processed by ECAP
    Figueiredo, Roberto B.
    Langdon, Terence G.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 430 (1-2): : 151 - 156
  • [8] Influence of preliminary extrusion conditions on the superplastic properties of a magnesium alloy processed by ECAP
    Furui, Mitsuaki
    Kitamura, Hiroki
    Anada, Hiroshi
    Langdon, Terence G.
    [J]. ACTA MATERIALIA, 2007, 55 (03) : 1083 - 1091
  • [9] High temperature compressive properties over a wide range of strain rates in an AZ31 magnesium alloy
    Ishikawa, K
    Watanabe, H
    Mukai, T
    [J]. JOURNAL OF MATERIALS SCIENCE, 2005, 40 (07) : 1577 - 1582
  • [10] Improvement of tensile properties of wrought magnesium alloys by grain refining
    Kamado, S
    Ashie, T
    Yamada, H
    Sanbun, K
    Kojima, Y
    [J]. MAGNESIUM ALLOYS 2000, 2000, 350-3 : 65 - 71
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