袁俊文,卢雅琳,张扬,李兴成,王健

• 1:江苏理工学院材料工程学院
• 2:江苏省高性能材料绿色成形技术与装备重点建设实验室

摘要(Abstract)：

通过光学显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)以及拉伸实验等方法研究了Y含量对Mg-1Al-0.3Ca-0.3Mn-0.4Zn合金微观组织和力学性能的影响，并通过电化学方法研究合金在3.5%NaCl溶液中的耐腐蚀性能。结果表明：Y元素的加入可以细化镁合金组织，合金组织主要由α-Mg、Al_2Y和Al_2Ca相组成。随着Y含量的增加，Al_2Y相出现且逐渐增多，Al_2Ca相逐渐减少直至消失。当Y含量低于1.5mass%时，合金的力学性能随Y含量的增加而升高。当Y含量大于1.5 mass%时，合金的力学性能反而降低。当Y含量为1.5 mass%时，合金的力学性能最佳，抗拉强度和伸长率分别为292.2 MPa和11.2%。Y的添加能够有效地降低合金的自腐蚀电流密度，当Y含量为1.5 mass%时，合金的自腐蚀电流密度最低，耐腐蚀性能最佳。

关键词(KeyWords)： 镁合金;Y元素;微观组织;力学性能;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51975404);; 江苏理工学院研究生实践创新计划项目(XSJCX21＿55)

作者(Author): 袁俊文,卢雅琳,张扬,李兴成,王健

DOI: 10.13289/j.issn.1009-6264.2022-0556

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