Microstructure and tensile properties of thixo-diecast AZ91D magnesium alloy

被引：0
作者：
Ai Xiulan [1 ]
Quan Gaofeng [2 ]
Liu Zhaoming [1 ]
Gao Hong [1 ]
机构：
[1] Liaoning Province Laboratory of Key Material for Railway, Dalian Jiaotong University
[2] School of Material Science and Engineering, Southwest Jiaotong University
来源：
China Foundry | 2013年 / 10卷 / 05期
关键词：
D O I：
暂无
中图分类号：
TG292 [轻金属铸造];
学科分类号：
080201 ; 080503 ;
摘要：
The thixo-diecasting(TDC)process is the combination of semi-solid billet preparation technology and die casting technology.The TDC process not only keeps the characteristics of thixo-forming but also has high efficiency and low cost.In the present work,the microstructures and mechanical properties of an AZ91D magnesium alloy prepared by the thixo-diecasting(TDC)process were characterized in as-cast condition.The TDC alloy produced exhibits a unique microstructure containingα-Mg solid solution andβ-Mg17Al12intermetallic compound,and there are some small droplets and a small gray globule with eutectic structure in the primaryα-Mg grains.The ultimate tensile strength and elongation of the TDC alloy also increase in comparison with other processes,such as thixocasting.Fracture surface observation shows that a crack mainly originates from the brittle fracture of the eutectic phases.The deformation of ductileα-Mg phase provides the TDC alloy with the main strain.
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页码：288 / 293
页数：6
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