添加Bi对AZ80镁合金显微组织及力学性能的影响

Saved in:
Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 21; no. 4; pp. 711 - 716
Main Author 王亚霄 周吉学 王杰 罗天骄 杨院生
Format Journal Article
LanguageEnglish
Published 2011
Subjects
AZ80镁合金
力学性能
显微组织
Online AccessGet full text

Cover

More Information
Bibliography:43-1239/TG
The effects of Bi addition on the microstructures and mechanical properties of as-cast AZ80 alloy were investigated. The results show that with the addition of Bi, the coarse eutectic phases are refined and become discontinuous; some flaky and granular Mg 3 Bi 2 phases with a hexagonal structure of D5 2 are observed along the grain boundaries and between dendrites. The tensile strength and elongation increase first, and then decrease with increasing Bi content. AZ80-0.5%Bi alloy has optimum combination mechanical properties. When the content of Bi is above 1.0% （mass fraction）, the amount of flaky Mg 3 Bi 2 phase increases markedly, which splits the matrix and deteriorates the tensile strength and elongation.
WANG Ya-xiao 1 , ZHOU Ji-xue 2 , WANG Jie 1 , LUO Tian-jiao 1 , YANG Yuan-sheng 1, 2 1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 2. New Materials Research Institute, Shandong Academy of Sciences, Ji’nan 250014, China
AZ80 magnesium alloy; bismuth; microstructure; mechanical property
ISSN:1003-6326