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Effects of Mn addition on the microstructures, mechanical properties and work-hardening of Mg-1Sn alloy

机译：MN添加对MG-1SN合金微结构，机械性能和硬化的影响

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摘要

Mg-Sn-Mn-based alloys exhibit great application prospect because of their high mechanical properties and good creep resistance. The content of Mn in Mg-Sn-based alloys is commonly less than 1 wt%. In this study, the effect of Mn addition on the microstructure, mechanical properties and work-hardening behavior of Mg-1Sn (wt%) alloys has been investigated. The as-extruded alloys are mainly composed of alpha-Mg and Mn precipitates, which exist in TM11 and TM12. The average grain size sharply decreases with Mn addition. In addition, with increase in Mn content, the basal texture of the alloys has strengthened. The experimental results show that Mn addition significantly increases the tensile and compressive yield strengths, ultimate tensile strengths, and elongation of the as-extruded Mg-Sn-Mn alloys because of the good microstructures. Moreover, the decrease of number of tensile twins in compress leads to the yield asymmetry reduces with Mn addition. With increasing Mn content, the value of work-hardening exponent and capacity decreases, the work-hardening behavior in stage III significantly improved. The variation in microstructures, mechanical properties and work-hardening of Mg-Sn-Mn alloys have been analyzed.
机译：由于其高机械性能和良好的蠕变性，Mg-Sn-Mn基合金具有很大的应用前景。 Mg-Sn基合金中Mn的含量通常小于1wt％。在该研究中，研究了MN-1SN（WT％）合金的微观结构，机械性能和工作硬化行为的MN添加的影响。用挤出的合金主要由α-Mg和Mn沉淀物组成，其存在于TM11和TM12中。平均晶粒尺寸随Mn添加急剧下降。另外，随着Mn含量的增加，合金的基础纹理增强。实验结果表明，由于良好的微观结构，MN添加显着增加了挤出的Mg-Sn-Mn合金的抗拉和压缩屈服强度，最终拉伸强度和伸长率。此外，压缩中的拉伸双胞胎数量的减少导致屈服不对称性与Mn加成减少。随着Mn含量的增加，工作 - 硬化指数和容量的值降低，阶段III中的工作 - 硬化行为显着提高。分析了Mg-Sn-Mn合金的微结构，机械性能和工作硬化的变化。

著录项

  • 来源
    《Materials Science and Engineering》 |2019年第29期|778-785|共8页
  • 作者

    Liao Hongxin; Kim Jonghyun; Liu Tingting; Tang Aitao; She Jia; Peng Peng; Pan Fusheng;

  • 作者单位

    Chongqing Univ Coll Mat Sci & Engn Chongqing 400044 Peoples R China|Chongqing Univ Natl Engn Res Ctr Magnesium Alloys Chongqing 400045 Peoples R China;

    Chongqing Univ Coll Mat Sci & Engn Chongqing 400044 Peoples R China|Chongqing Univ Natl Engn Res Ctr Magnesium Alloys Chongqing 400045 Peoples R China;

    Southwest Univ Fac Mat & Energy Chongqing 400715 Peoples R China;

    Chongqing Univ Coll Mat Sci & Engn Chongqing 400044 Peoples R China|Chongqing Univ Natl Engn Res Ctr Magnesium Alloys Chongqing 400045 Peoples R China;

    Chongqing Univ Coll Mat Sci & Engn Chongqing 400044 Peoples R China|Chongqing Univ Natl Engn Res Ctr Magnesium Alloys Chongqing 400045 Peoples R China;

    Chongqing Univ Coll Mat Sci & Engn Chongqing 400044 Peoples R China|Chongqing Univ Natl Engn Res Ctr Magnesium Alloys Chongqing 400045 Peoples R China;

    Chongqing Univ Coll Mat Sci & Engn Chongqing 400044 Peoples R China|Chongqing Univ Natl Engn Res Ctr Magnesium Alloys Chongqing 400045 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mg-Sn-Mn; Mechanical properties; Work-hardening; Basal texture;

    机译：Mg-Sn-Mn;机械性能;工作硬化;基础纹理;

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