Detwinning behavior of Mg-3Al-1Zn alloy at elevated temperatures

被引:25
作者
Yu, Huihui [1 ]
Xin, Yunchang [1 ]
Zhou, Hua [1 ]
Hong, Rui [1 ]
Zhao, Lingyu [1 ]
Liu, Qing [1 ]
机构
[1] Chongqing Univ, Sch Mat Sci & Engn, Chongqing 400044, Peoples R China
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 617卷
基金
中国国家自然科学基金;
关键词
Mg alloy; Detwinning; Temperature; Twin boundary migration; WROUGHT MAGNESIUM ALLOY; LOW-CYCLE FATIGUE; STRAIN-RATE; DEFORMATION-BEHAVIOR; ROOM-TEMPERATURE; AZ31; TEXTURE; MG; MICROSTRUCTURE; FORMABILITY;
D O I
10.1016/j.msea.2014.08.034
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Detwinning behavior of a strongly textured magnesium alloy AZ31 at different temperatures was investigated, with a focus on the effect of temperature on twin boundaries (TBs) migration. A hot extruded Mg alloy AZ31 rod was subjected to a 3% pre-compression along the extrusion direction (ED) to generate {10 (1) over bar2} twins. Subsequent tensions along the ED at temperatures of 30 degrees C, 100 degrees C, 150 degrees C, 200 degrees C and 250 degrees C, respectively, were carried out to initiate detwinning. Mechanical behavior and microstructure evolution during detwinning deformation were examined. Our results show that the activation stress for {10 (1) over bar2} TBs migration decreases with the increasing of temperature from 30 degrees C to 250 degrees C. Even at 250 degrees C, detwinning rather than non-basal slips dominates tension along the ED of pre-strained specimens. All strain hardening curves of detwinning deformation at temperatures of 30-250 degrees C contain three stages that often appear in a {10 (1) over bar2} twinning predominant deformation. The length of Stage II is predominantly related to {10 (1) over bar2} twin volume fraction. It is found that the peak hardening rate in Stage II decreases with increased temperature. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:24 / 30
页数:7
相关论文
共 37 条
  • [1] Room temperature formability of a magnesium AZ31 alloy: Examining the role of texture on the deformation mechanisms
    Al-Samman, T.
    Gottstein, G.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 488 (1-2): : 406 - 414
  • [2] [Anonymous], 2011, NONLINEAR MECH CRYST
  • [3] Effect of temperature and strain rate on the deformation behavior and microstructure of a homogenized AZ31 magnesium alloy
    Bajargan, Govind
    Singh, Gaurav
    Sivakumar, D.
    Ramamurty, U.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 579 : 26 - 34
  • [4] Hot working and crystallographic texture analysis of magnesium AZ alloys
    Bhattacharya, R.
    Wynne, B. P.
    [J]. MATERIALS SCIENCE AND TECHNOLOGY, 2011, 27 (02) : 461 - 477
  • [5] Boiko VS., 1994, Reversible crystal plasticity
  • [6] Study on cyclic deformation behavior of extruded Mg-3Al-1Zn alloy
    Chen, Cheng
    Liu, Tianmo
    Lv, Chengling
    Lu, Liwei
    Luo, Dongzhi
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 539 : 223 - 229
  • [7] Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation
    Fernandez, Ana
    Perez Prado, Maria Teresa
    Wei, Yujie
    Jerusalem, Antoine
    [J]. INTERNATIONAL JOURNAL OF PLASTICITY, 2011, 27 (11) : 1739 - 1757
  • [8] Texture effects on plastic deformation of magnesium
    Gehrmann, R
    Frommert, MM
    Gottstein, G
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 395 (1-2): : 338 - 349
  • [9] Stress-strain response of textured AZ31B magnesium alloy under uniaxial tension at the different strain rates
    Geng, C. J.
    Wu, B. L.
    Du, X. H.
    Wang, Y. D.
    Zhang, Y. D.
    Wagner, F.
    Esling, C.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 559 : 307 - 313
  • [10] Gua C.F., 2012, SCRIPTA MATER, V67, P673