钱圣男,董闯,谷立东,吴玉娟,邹建新

• 1:三束材料改性教育部重点实验室大连理工大学材料与工程学院
• 2:轻合金精密成型国家工程研究中心上海交通大学材料科学与工程学院

摘要(Abstract)：

采用了团簇加连接原子模型描述了Mg-Al-Ce固溶体中的近程有序结构,构建了该类合金的理想成分式[(Al,Ce)_1-Mg_(12)]Mg_1,并据此设计了成分为[(Al_(0.925)Ce_(0.075))-Mg_(12)]Mg_1(Mg_(92.86)Al_(6.61)Ce_(0.54),at%;Mg-7.1Al-3.0Ce,mass%)的ACe73合金,通过永久模重力铸造(PM)工艺获得铸态合金。结果表明:合金显微组织为α-Mg基体中均匀分布着大量不连续的β-Mg17Al11相和针状Al_(11)Ce_3相,拉伸实验测得该合金抗拉强度为210 MPa,屈服强度为99.3 MPa,伸长率为9.0%,相比于其他PM工艺制备的Mg-Al-Ce铸态合金,强度最高。

关键词(KeyWords)： Mg-Al-Ce合金;团簇加连接原子模型;成分式;近程有序;合金成分设计

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2016YFB0701201)

作者(Author): 钱圣男,董闯,谷立东,吴玉娟,邹建新

DOI: 10.13289/j.issn.1009-6264.2017-0353

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