何杰军,吴鲁淑,杨江

• 1:贵州理工学院材料与能源工程学院
• 2:贵州理工学院机械工程学院

摘要(Abstract)：

对合金材料来说,退火之后是软化还是硬化,对后续加工工艺的制定有重要影响。为了研究挤压态AZ60镁合金在变形前后的退火力学行为,对其分别进行没有经预先塑性变形和存在预先塑性变形的175℃低温退火处理,研究塑性变形和低温退火对合金组织和力学性能的影响。结果表明:没有经预先塑性变形的挤压态AZ60镁合金,175℃退火处理对其力学性能没有明显的影响。当合金沿着挤压方向预先压缩,产生了■孪晶,之后再进行175℃低温退火时,第二相Al_(12)Mg_(17)在晶界、孪晶界以及孪晶内析出,在随后的变形中阻碍了位错运动和孪晶的长大,显著地提高了合金的屈服强度。

关键词(KeyWords)： 镁合金;孪生;第二相;力学性能

Abstract:

Keywords:

基金项目(Foundation): 贵州省科学技术基金项目([2019]1141)

作者(Author): 何杰军,吴鲁淑,杨江

DOI: 10.13289/j.issn.1009-6264.2021-0178

参考文献(References)：

• [1] 李奇.ZK60镁合金板材轧制工艺研究[D].合肥：合肥工业大学，2017.LI Qi.Research on rolling process of ZK60 magnesium alloy sheet[D].Hefei:Hefei University of Technology,2017.
• [2] Zhou B,Tai J,Lu Y,et al.Dislocation-modified high index twinning mechanisms in deformed magnesium alloy[J].Journal of Alloys and Compounds,2019,787(10):423-428.
• [3] Hou D W,Li Q Z,Wen H M.Study of reversible motion of ■ tensile twin boundaries in a magnesium alloy[J].Materials Letters,2018,231(22):84-86.
• [4] Chen P,Wang F X,Ombogo J,et al.Formation of ■ between ■ twin variants in deformation of a magnesium alloy[J].Materials Science and Engineering A,2019,739(2):173-185.
• [5] Liu C,Shanthraj P,Robson J D,et al.On the interaction of precipitates and tensile twins in magnesium alloys[J].Acta Materialia,2019,178(10):146-162.
• [6] Cheng J,Ghosh S.A crystal plasticity FE model for deformation with twin nucleation in magnesium alloys[J].International Journal of Plasticity,2015,67(4):148-170.
• [7] He J J,Liu T M,Xu S,et al.The effects of compressive pre-deformation on yield asymmetry in hot-extruded Mg-3Al-1Zn alloy[J].Materials Science and Engineering A,2013,579(18):1-8.
• [8] Dudamell N,Ulacia I,Gálvez F,et al.Twinning and grain subdivision during dynamic deformation of a Mg AZ31 sheet alloy at room temperature[J].Acta Materialia,2011,59(18):6949-6962.
• [9] Wu B,Duan G,Du X,et al.In situ investigation of extension twinning-detwinning and its effect on the mechanical behavior of AZ31B magnesium alloy[J].Materials Design,2017,132(10):57-65.
• [10] Ulacia I,Dudamell N V,Galvez F.Mechanical behavior and microstructural evolution of a Mg AZ31 sheet at dynamic strain rates[J].Acta Materialia,2010,58(8):2988-2998.
• [11] Xin Y C,Zhou X J,Chen H W,et al.Annealing hardening in detwinning deformation of Mg-3Al-1Zn alloy[J].Materials Science and Engineering A,2014,594:287-291.
• [12] Nie J F,Zhu Y M,Liu J Z,et al.Periodic segregation of solution atoms in fully coherent twin boundaries[J].Science,2013,340:957-960.
• [13] Zhang X Y,Li B,Wu X L,et al.Twin boundaries showing very large deviations from the twinning plane[J].Scripta Materialia,2012,67(10):862-865.
• [14] Liu B Y,Prasad E,Yang F,et al.In-situ quantitative TEM investigation on the dynamic evolution of individual twin[J].Acta Materialia,2019,179(19):414-423.
• [15] Paudel Y B,Indeck J,Hazeli K,et al.Characterization and modeling of ■ twin banding in magnesium[J].Acta Materialia,2020,183(1):438-451.
• [16] Long Z X,Liu T M,He J J.The effects of pre-strain and subsequent annealing on the yielding behavior in a rolled magnesium alloy AZ31[J].Journal of Materials Engineering and Performance,2015,24(1):16-23.
• [17] Zhang Y,Liu T M,Ding X Z.The precipitation behavior of a pretwinned Mg-6Al-1Zn alloy and the effect on subsequent deformation[J].Journal of Materials Research,2014,29(18):2141-2146.

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