Effect of Sc and Zr on Al₆(Mn,Fe) Phase in Al-Mg-Mn Alloys

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  • Luo Xier
    School of Materials Science and Engineering, Central South University
  • Fang Hongjie
    Department of Materials Science and Engineering, Yantai Nanshan University
  • Liu Hui
    Department of Materials Science and Engineering, Yantai Nanshan University
  • Yan Yang
    School of Materials Science and Engineering, Central South University
  • Zhu Hualong
    School of Materials Science and Engineering, Central South University
  • Yu Kun
    School of Materials Science and Engineering, Central South University

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タイトル別名
  • Effect of Sc and Zr on Al<sub>6</sub>(Mn,Fe) Phase in Al–Mg–Mn Alloys

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<p>The effects of Sc and Zr on the shape, size, and number density of Al6(Mn,Fe) phase in Al–5Mg–0.7Mn alloys were investigated by this article. The results showed that Sc and Zr can form strengthening particles of Al3Sc and Al3(Sc,Zr), which have the effect of refining grains and modifying the morphology and distribution of Al6(Mn,Fe) phase. The OM, SEM, and TEM images indicate that with the formation of primary Al3Sc and Al3(Sc,Zr), the shape of Al6(Mn,Fe) became more regular, size of Al6(Mn,Fe) became smaller, and the number density of Al6(Mn,Fe) increased when compared with base alloy. Zr could motivate the precipitation of primary Al3(Sc,Zr) and Al–5Mg–0.7Mn–0.2Sc–0.2Zr had better refining effect than Al–5Mg–0.7Mn–0.4Sc. The grain refinement and finely dispersed Al6(Mn,Fe) phase can improve the mechanical properties such as yield strength and ultimate tensile strength and the corrosion resistance by the results of intergranular corrosion (IGC) also improved.</p>

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 60 (5), 737-742, 2019-05-01

    公益社団法人 日本金属学会

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