Effect of Hot Rolling on the Microstructure and Mechanical Performance of a Mg-5Sn Alloy.

Effect of Hot Rolling on the Microstructure and Mechanical Performance of a Mg-5Sn Alloy.
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热轧对 Mg-5Sn 合金显微组织和力学性能的影响。

DOI:
10.3390/ma15175973
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发表时间:
2022-08-29
期刊:
Materials (Basel, Switzerland)
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在380 °C下以三种不同的轧制压下量(30%、50%和70%)对Mg-5Sn合金进行热轧,并考察其对显微组织和力学性能的影响。随着轧制压下量的增加,晶粒尺寸减小,而Mg 2Sn颗粒的面积分数和位错密度增加。因此,屈服强度(YS)和极限抗拉强度(UTS)表现出上升的趋势,而伸长率(EL)表现出下降的趋势,随着轧制压下量的增加。经70%热轧后的合金具有310 MPa的高强度和8.4%的电致发光。强度的提高主要归因于析出强化、晶粒细化强化和位错强化。
A Mg-5Sn alloy was hot rolled at 380 °C with three different rolling reductions (30%, 50%, and 70%), and its effect on the microstructure and mechanical performance was examined. Grain size decreases, whereas the area fraction of Mg2Sn particles and dislocation density increase with the increase in rolling reduction. Therefore, the yield strength (YS) and ultimate tensile strength (UTS) exhibit an ascending trend, whereas the elongation (EL) shows a descending trend with increasing rolling reduction. The alloy hot rolled for 70% possesses a high strength of 310 MPa and an EL of 8.4%. The strength enhancement is mainly ascribed to precipitation strengthening, grain refinement strengthening, and dislocation strengthening.
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