准晶增强Mg-Zn-Y合金显微组织及凝固过程研究
Study on Microstructure and Solidification Process of Quasicrystal Reinforced Mg-Zn-Y Alloy
叶杰 1林小娉 1刘凤芳 1付守军2
作者信息
- 1. 东北大学材料科学与工程学院,辽宁沈阳 110819;东北大学秦皇岛分校,河北省电解质与电介质功能材料重点实验室,河北秦皇岛 066004;东北大学秦皇岛分校,秦皇岛市先进金属材料及成型技术重点实验室,河北秦皇岛 066004
- 2. 中信戴卡股份有限公司工程技术研究院,河北秦皇岛 066011
- 折叠
摘要
采用SEM、XRD、DSC和Factsage 8.0热力学计算软件研究了Mg-9.02Zn-1.68Y合金的显微组织和凝固过程.研究表明,Mg-9.02Zn-1.68Y合金室温组织主要由α-Mg、准晶I-Mg3Zn6Y和Mg7Zn3相组成,其凝固过程为先结晶出枝晶α-Mg,之后发生二元共晶转变形成(α-Mg+I-Mg3Zn6Y)共晶组织,最后随着温度降低形成少量(α-Mg+Mg7Zn3)共晶组织.由于试验合金中存在含量较高的准晶I-Mg3Zn6Y相,其硬度达HV70,从而为后续再加工或时效热处理打下良好的性能基础.
Abstract
The microstructure and solidification process of Mg-9.02Zn-1.68Y alloy were studied by SEM,XRD,DSC and Factsage 8.0 thermodynamic calculation software.The results show that the room temperature microstructure of Mg-9.02Zn-1.68Y alloy is mainly composed of α-Mg,quasicrystalline I-Mg7Zn6Y and Mg7Zn3.The solidification process of Mg-9.02Zn-1.68Y alloy is that dendritic α-Mg is crystallized first,then binary eutectic transformation takes place to form(α-Mg+I-Mg7Zn6Y)eutectic structure,and finally a small amount of(α-Mg+Mg7Zn3)eutectic structure is formed with the decrease of temperature.Due to the high content of quasicrystalline I-Mg3Zn6Y phase in the experimental alloy,the hardness of the alloy is HV70,which lays a good foundation for subsequent reprocessing or heat treatment.
关键词
Mg-Zn-Y合金/准晶增强/显微组织/凝固过程Key words
Mg-Zn-Y alloy/quasicrystal strengthening/microstructure/solidification process引用本文复制引用
基金项目
中央高校基本科研业务费(N2323012)
河北省自然科学基金(E2022501001)
出版年
2024
国家科技期刊平台
NSTL
万方数据