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Effects of Al, Y, and Zn Additions on the Microstructure and Mechanical Properties of Mg−3Li Alloy
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2022-01-19 , DOI: 10.1002/adem.202101502 Yang Li 1 , Jiahao Wang 1 , Ruizhi Wu 1, 2 , Zhen Wei 1 , Qing Ji 1 , Feng Zhong 1 , Shun Zhang 1 , Zhenzhao Yang 1 , Jiaxiu Wang 1 , Siyuan Jin 1 , Lin Xu 1 , Legan Hou 1
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2022-01-19 , DOI: 10.1002/adem.202101502 Yang Li 1 , Jiahao Wang 1 , Ruizhi Wu 1, 2 , Zhen Wei 1 , Qing Ji 1 , Feng Zhong 1 , Shun Zhang 1 , Zhenzhao Yang 1 , Jiaxiu Wang 1 , Siyuan Jin 1 , Lin Xu 1 , Legan Hou 1
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The influence of Al, Y, and Zn additions on the microstructure and mechanical properties of Mg−3Li alloy is investigated. It is revealed that Al and Y form the Al2Y phase that can refine α-Mg grains. Y and Zn form the 18R long-period-stacking-ordered (LPSO) structure phase that can coordinate deformation. In addition, the formed SFs can hinder dislocation slip. However, the Mg24Y5 phase weakens the grain boundaries. After solid solution at 520 °C, the Al2Y phase and LPSO phase do not change. The Mg24Y5 phase gradually disappears, SFs decrease, and the grain of the alloy grows. After subsequent hot rolling at 350 °C, the grains and LPSO phase are gradually elongated along the rolling direction, and the LPSO phase is twisted. SFs increase and the grain of the alloy is refined. In addition, MgY phase is precipitated inside the matrix. With the rolling reduction of 70%, the Mg−3Li−1Al−4Y−1Zn alloy possesses the ultimate tensile strength (UTS) and elongation (EL) values of 287 MPa and 5.2%.
中文翻译：
Al、Y、Zn的添加对Mg-3Li合金组织和力学性能的影响
研究了添加 Al、Y 和 Zn 对 Mg-3Li 合金显微组织和力学性能的影响。可知Al和Y形成了能够细化α-Mg晶粒的Al 2 Y相。Y和Zn形成可以协调变形的18R长周期堆叠有序（LPSO）结构相。此外，形成的SFs可以阻碍位错滑移。然而，Mg 24 Y 5相削弱了晶界。520℃固溶后，Al 2 Y 相和LPSO 相不发生变化。Mg 24 Y 5相逐渐消失，SFs减少，合金晶粒长大。随后在350℃热轧后，晶粒和LPSO相沿轧制方向逐渐拉长，LPSO相发生扭曲。SFs增加，合金晶粒细化。此外，MgY 相在基体内部析出。压下率为 70% 时，Mg-3Li-1Al-4Y-1Zn 合金具有 287 MPa 和 5.2% 的极限抗拉强度 (UTS) 和延伸率 (EL) 值。
更新日期：2022-01-19
中文翻译：
Al、Y、Zn的添加对Mg-3Li合金组织和力学性能的影响
研究了添加 Al、Y 和 Zn 对 Mg-3Li 合金显微组织和力学性能的影响。可知Al和Y形成了能够细化α-Mg晶粒的Al 2 Y相。Y和Zn形成可以协调变形的18R长周期堆叠有序（LPSO）结构相。此外，形成的SFs可以阻碍位错滑移。然而，Mg 24 Y 5相削弱了晶界。520℃固溶后，Al 2 Y 相和LPSO 相不发生变化。Mg 24 Y 5相逐渐消失，SFs减少，合金晶粒长大。随后在350℃热轧后，晶粒和LPSO相沿轧制方向逐渐拉长，LPSO相发生扭曲。SFs增加，合金晶粒细化。此外，MgY 相在基体内部析出。压下率为 70% 时，Mg-3Li-1Al-4Y-1Zn 合金具有 287 MPa 和 5.2% 的极限抗拉强度 (UTS) 和延伸率 (EL) 值。
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