稀土镁合金中LPSO相的研究进展
Research Progress of LPSO Phase in Rare Earth Magnesium Alloy
高傲 1李全安 2陈晓亚 2梅婉婉 1陈培军 3谭劲峰 4李向宇5
作者信息
- 1. 河南科技大学材料科学与工程学院,河南洛阳 471023
- 2. 河南科技大学材料科学与工程学院,河南洛阳 471023;有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳 471023
- 3. 洛阳晟雅镁合金科技有限公司,河南洛阳 471921
- 4. 中铝洛阳铜加工有限公司,河南洛阳 471003
- 5. 洛阳铜加工集团有限责任公司,河南洛阳 471003
- 折叠
摘要
镁合金具有比强度高、比刚度高、质量轻、切削性能好等优点,在航空航天、汽车制造及医疗服务等领域有着广泛的应用前景,但其绝对强度低,塑性差,限制了镁合金在一些领域的应用.为了改善镁合金综合性能,研究发现在镁合金中按一定比例加入稀土元素与过渡族元素后,会出现一种长周期有序堆垛结构(Long Period Stacking Ordered,简称LPSO相),LPSO相具有高硬度、高抗蠕变性能、高弹性模量等优点,能够同时改善合金的强度和塑性,因此,LPSO相引起了广大研究人员的关注.本文综述了稀土镁合金中LPSO相的研究进展,全面分析了 LPSO相的类型及原子排布,讨论了 LPSO相的形成机制和规律,以及LPSO相对合金性能的影响机制,评述了通过第一性原理对LPSO相晶体结构、弹性模量和LPSO相与层错能间关系的研究,最后对含LPSO相稀土镁合金的未来发展做出展望.
Abstract
Magnesium alloy has many advantages,such as high specific strength,high specific stiffness,light weight and high machinability,etc.It has a wide application prospect in aerospace,automobile manufacturing and medical services,but its low absolute strength and poor plasticity limit its application in some fields.In or-der to improve the comprehensive properties of magnesium alloys,it is found that after adding rare earth ele-ments and transition group elements in a certain proportion,a long period stacking ordered structure(LPSO phase)will appear.LPSO phase has the advantages of high hardness,high creep resistance and high elastic modulus,which can simultaneously improve the strength and plasticity of the alloys.Therefore,LPSO phase has attracted the attention of researchers.In this paper,the research progress of LPSO phase in rare earth magne-sium alloys is reviewed,the types and atomic arrangement of LPSO phase are comprehensively analyzed,the formation mechanism and law of LPSO phase and the influence mechanism of LPSO phase on alloy properties are discussed,and the first-principles research on the crystal structure,elastic modulus and the relationship be-tween LPSO phase and stacking fault energy of LPSO phase is reviewed.Finally,we prospect the future develop-ment of rare earth magnesium alloys containing LPSO phase.
关键词
稀土镁合金/LPSO相/微观结构/第一性原理Key words
rare earth magnesium alloy/LPSO phase/microstructure/first principles引用本文复制引用
基金项目
国家自然科学基金(52201119)
中原英才计划中原青年拔尖人才项目(豫组通[2021]44号)
河南省自然科学基金(222300420435)
出版年
2024
NETL
NSTL
万方数据