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Microstructural and mechanical properties of AZ31 magnesium alloy with Cr addition and CO_2 incorporation during processing

机译：加工过程中添加Cr和CO_2的AZ31镁合金的组织和力学性能

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摘要

AZ31 Mg-alloy with ～5 wt.% Cr and incorporated with CO_2 during processing were produced using the disintegrated melt deposition technique. The effect of Cr addition and CO_2 incorporation on the microstructural and mechanical properties was investigated after extrusion. Microstructural investigation revealed that the addition of Cr (AZ31-5Cr) significantly refined the grain size, and the incorporation of CO_2 (AZ31-5Cr-CO_2) resulted in the in situ formation of chromium carbide (Cr_(23)C_6) phase. The evaluation of mechanical properties indicated that when compared to the AZ31 base alloy, both AZ31-5Cr and AZ31-5Cr-CO_2 showed significant improvement in the strength properties. Based on the structure-mechanical properties correlation, it was identified that in AZ31- 5Cr, Cr acted as a metallic reinforcement that improved the hardness, tensile and compressive yield strengths. In AZ31-5Cr-CO_2, the in situ formed Cr_(23)C_6 phase acted as a strengthening phase and enhanced the mechanical properties, which were significantly higher than those of AZ31 base alloy and AZ31- 5Cr.
机译：使用分解熔体沉积技术生产了Cr含量约为5％的AZ31镁合金，并在加工过程中掺入了CO_2。挤压后研究了Cr的添加和CO_2的掺入对组织和力学性能的影响。显微组织研究表明，Cr（AZ31-5Cr）的添加显着细化了晶粒尺寸，CO_2（AZ31-5Cr-CO_2）的掺入导致原位形成碳化铬（Cr_（23）C_6）相。力学性能评估表明，与AZ31基合金相比，AZ31-5Cr和AZ31-5Cr-CO_2均显示出强度性能的显着改善。基于结构-机械性能的相关性，可以确定，在AZ31-5Cr中，Cr用作金属增强材料，从而改善了硬度，拉伸和压缩屈服强度。在AZ31-5Cr-CO_2中，原位形成的Cr_（23）C_6相起到了增强相的作用，并增强了机械性能，明显高于AZ31基合金和AZ31-5Cr。

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  • 来源
    《Materials Chemistry and Physics》 |2012年第3期|721-727|共7页
  • 作者

    S. Jayalakshmi; Q.B. Nguyen; M. Gupta;

  • 作者单位

    Department of Mechanical Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, Singapore 117576, Singapore;

    Department of Mechanical Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, Singapore 117576, Singapore;

    Department of Mechanical Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, Singapore 117576, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnesium alloys; composites; in situ method; CO_2 incorporation; microstructure; mechanical properties;

    机译：镁合金复合材料原位法CO_2掺入;微观结构机械性能;

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