铸态Mg-9Er-6Y-xZn-0.6Zr合金的显微组织及相组成（英文）

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Bibliographic Details
Published in中国有色金属学报：英文版 no. 4; pp. 889 - 895
Main Author 王敬丰 宋鹏飞 潘复生 周小蒽
Format Journal Article
LanguageEnglish
Published 2013
Subjects
显微组织
相组成
镁合金
长周期堆垛有序（LPSO）相
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Bibliography:magnesium alloys; microstructure; phase composition; long-period stacking ordered （LPSO） structure phase
43-1239/TG
Jing-feng WANG, Peng-fei SONG, Fu-sheng PAN, Xiao-en ZHOU （1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 2. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China Received 9 January 2012; accepted 19 September 2012）
The microstructure and phase composition of as-cast Mg-9Er-6Y-xZn-0.6Zr （x=1, 2, 3, 4; normal mass fraction in %） alloys were investigated. In low Zn content, aside from the major second phase of Mg24（Er, Y, Zn）5, there are a few lamellar phases that grow parallel with each other from the grain boundaries to the grain interior. With Zn content increasing, the Mg24（Er, Y, Zn）5 phase decreases, but the Mg12Zn（Y, Er） phase and lamellar phases continuously increase. When Zn content reaches 4% （normal mass fraction）, the Mg12Zn（Y, Er） phase mainly exists as large bulks, and some a-Mg grains are thoroughly penetrated by the lamellar phases. Moreover, the crystallography structures of the Mgl2Zn（Y, Er） and Mg24（Er, Y, Zn）5 phases are confirmed as 18R-type long-period stacking ordered structure and body-centred cubic structure, respectively.
ISSN:1003-6326