Abstract The effect of samarium (Sm) addition on the microstructure, mechanical performance and corrosion behavior of extruded AZ41-xSm (x = 0%, 1%, 2% and 3%) alloys has been investigated by using optical microscope (OM), X-ray diffusion (XRD), scanning electronic microscope (SEM) equipped with energy dispersive spectroscope (EDS), tensile testing, hydrogen evolved and electrochemical tests. It is observed that Sm alloyed AZ41 alloys consist of α-Mg substrate, β-Mg17Al12 and Al2Sm intermetallic. The β-phase is gradually inhibited with increasing Sm content. The tensile testing result shows that the appropriate amount of Sm addition slightly enhances the mechanical strength. 2Sm alloyed alloy (AZ41-2Sm) displays optimal tensile properties, with a yield tensile strength (YTS) of 216.4 MPa, ultimate tensile strength (UTS) of 295.9 MPa and elongation (EL) of 15.9%, which is the result of second phase strengthening. The addition of Sm significantly improved the corrosion resistance of AZ41 alloy. The AZ41-1Sm alloy exhibits the best corrosion resistance properties with a corrosion rate about one-half that of the AZ41 alloy based on the hydrogen evolved and electrochemical test.

中文翻译：

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添加钐对挤压态AZ41合金显微组织、力学性能和腐蚀行为的影响

摘要 利用光学显微镜 (OM) 研究了添加钐 (Sm) 对挤压 AZ41-xSm (x = 0%、1%、2% 和 3%) 合金的显微组织、力学性能和腐蚀行为的影响， X 射线扩散 (XRD)、配备能谱仪 (EDS) 的扫描电子显微镜 (SEM)、拉伸测试、析氢和电化学测试。观察到 Sm 合金化 AZ41 合金由 α-Mg 基体、β-Mg17Al12 和 Al2Sm 金属间化合物组成。随着 Sm 含量的增加，β 相逐渐被抑制。拉伸试验结果表明，适量的Sm添加量略微提高了机械强度。2Sm 合金 (AZ41-2Sm) 显示出最佳拉伸性能，屈服拉伸强度 (YTS) 为 216.4 MPa，极限拉伸强度 (UTS) 为 295。9 MPa 和 15.9% 的伸长率 (EL)，这是第二相强化的结果。Sm的加入显着提高了AZ41合金的耐蚀性。根据析氢和电化学测试，AZ41-1Sm合金表现出最好的耐腐蚀性能，腐蚀速率约为AZ41合金的二分之一。