LA141-xBi (x = 0, 1, 2, 3) alloys were prepared, and the effects of Bi alloying and cold rolling on the microstructure and mechanical properties were investigated. The results indicate that, with the addition of Bi, the grains were refined, and MgBi phase is formed in the alloys. The as-cast LA141-2Bi possesses the tensile strength of 174 MPa, 21% higher than that of LA141 alloy. The cold rolled LA141-2Bi alloy exhibits a good balance between strength and plasticity, with a tensile strength of 237 MPa and an elongation of 30.5%. This improvement is primarily attributed to grain refinement, the dispersion of second-phase particles, high-density dislocations, and the presence of nano-twins.

中文翻译：

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Bi合金化和冷轧对LA141 Mg[sbnd]Li合金显微组织和力学性能的影响

制备了LA141-xBi(x=0、1、2、3)合金，研究了Bi合金化和冷轧对合金组织和力学性能的影响。结果表明，Bi的添加细化了合金中的晶粒，并形成了MgBi相。铸态LA141-2Bi的抗拉强度为174 MPa，比LA141合金高21%。冷轧LA141-2Bi合金表现出良好的强度和塑性平衡，抗拉强度为237 MPa，延伸率为30.5%。这种改进主要归因于晶粒细化、第二相颗粒的分散、高密度位错和纳米孪晶的存在。