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首页> 外文期刊>Materials Science and Engineering >Investigation on microstructure and creep properties of as-cast and aging-treated Mg-6Sn-5Al-2Si alloy
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Investigation on microstructure and creep properties of as-cast and aging-treated Mg-6Sn-5Al-2Si alloy

机译：铸态和时效处理的Mg-6Sn-5Al-2Si合金的组织和蠕变性能研究

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摘要

This study examined the high temperature mechanical properties of as-cast, solution-treated and aging-treated Mg-6Sn-5Al-2Si alloy. The microstructure of as-cast Mg-6Sn-5Al-2Si alloy mainly consisted of α-Mg, Mg_(17)Al_(12), Mg_2Si and Mg_2Sn phases. After solution heat-treatment, most of theMg_(17)Al_(12) phases were dissolved into the matrix. In the case of aging heat-treatment, finely distributed Mg_(17)Al_(12) and Mg_2Sn phases were evenly formed inside the grains. The ultimate tensile strength of solution treated Mg-6Sn-5Al-2Si alloy at 25 ℃ was decreased due to the reduced volume fraction of Mg_(17)Al_(12) phase. However, the creep resistance was increased by solution heat-treatment because of complete dissolution of the thermally unstable Mg_(17)Al_(12) phase into the Mg matrix. On the other hand, both the tensile strength at 25 ℃ and creep resistance of the peak-aged Mg-6Sn-5Al-2Si alloy were improved as compared to those of the as-cast alloy. It seems that the improved mechanical properties were associated with finely distributed Mg_(17)Al_(12) and Mg_2Sn phases.
机译：这项研究检查了铸态，固溶处理和时效处理的Mg-6Sn-5Al-2Si合金的高温力学性能。 Mg-6Sn-5Al-2Si合金的显微组织主要由α-Mg，Mg_（17）Al_（12），Mg_2Si和Mg_2Sn相组成。固溶热处理后，大多数Mg_（17）Al_（12）相溶解在基质中。在时效热处理的情况下，细小分布的Mg_（17）Al_（12）和Mg_2Sn相均匀地形成在晶粒内部。由于减少了Mg_（17）Al_（12）相的体积分数，降低了固溶处理的Mg-6Sn-5Al-2Si合金在25℃时的极限抗拉强度。但是，由于将热不稳定的Mg_（17）Al_（12）相完全溶解到Mg基体中，因此通过固溶热处理提高了抗蠕变性。另一方面，与铸态合金相比，峰值时效Mg-6Sn-5Al-2Si合金在25℃时的抗拉强度和抗蠕变性均得到改善。似乎改善的机械性能与精细分布的Mg_（17）Al_（12）和Mg_2Sn相有关。

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  • 来源
    《Materials Science and Engineering》 |2011年第17期|p.5394-5399|共6页
  • 作者

    Sang Gu Lee; Jong Jin Jeon; Kyung Chul Park; Yong Ho Park; Ik Min Park;

  • 作者单位

    Department of Material Science and Engineering, Pusan National University San 30 Jangjeon-dong, Geumjeong-gu, Susan 609-735, Republic of Korea;

    Department of Material Science and Engineering, Pusan National University San 30 Jangjeon-dong, Geumjeong-gu, Susan 609-735, Republic of Korea;

    Department of Material Science and Engineering, Pusan National University San 30 Jangjeon-dong, Geumjeong-gu, Susan 609-735, Republic of Korea;

    Department of Material Science and Engineering, Pusan National University San 30 Jangjeon-dong, Geumjeong-gu, Susan 609-735, Republic of Korea;

    Department of Material Science and Engineering, Pusan National University San 30 Jangjeon-dong, Geumjeong-gu, Susan 609-735, Republic of Korea;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    mg alloys; microstructure; creep properties; heat treatment;

    机译：镁合金;显微组织;蠕变性能;热处理;

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