焦琰珂,熊毅,姚怀

• 1:河南科技大学材料科学与工程学院
• 2:河南省有色金属共性技术协同创新中心

摘要(Abstract)：

采用X射线衍射仪、光学显微镜、扫描电镜和透射电镜等研究了铸态Mg-2.0Zn-0.4Mn-xAl (x=0, 2.0, 3.0, 4.0, 5.0, 6.0 mass%)合金的物相和显微组织，采用拉伸实验测试了合金的力学性能，采用静态质量损失法和电化学测试实验研究了合金的耐腐蚀性能。结果表明：含Al合金的组织主要由α-Mg基体及不同形貌的Mg_2(Zn, Al)_(11)和MgZn_2第二相组成。随着Al含量的增加，合金的晶粒尺寸逐渐减小，其力学性能和耐腐蚀性能先升高后降低。当Al含量为4.0 mass%时，合金具有较好的力学性能及耐腐蚀性能，其极限抗拉强度、屈服强度及伸长率分别为(158.4±4.2) MPa、(119.2±5.8) MPa及(15.6±0.5)%,在3.5%NaCl溶液中浸泡72 h后，其平均静态腐蚀速率和析氢腐蚀速率分别为(0.958±0.057)和(0.933±0.051) mm/y。

关键词(KeyWords)： 镁合金;显微组织;力学性能;耐腐蚀性

Abstract:

Keywords:

基金项目(Foundation): 河南省高等学校重点科研项目(20A430010);; 国家自然科学基金(U1804146)

作者(Author): 焦琰珂,熊毅,姚怀

DOI: 10.13289/j.issn.1009-6264.2022-0146

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