Grain refinement of DC cast AZ91D Mg alloy by intensive melt shearing

被引：19
|
作者：
Zuo, Y. B. [1 ]
Xia, M. X. [1 ]
Liang, S. M. [1 ]
Wang, Y. [1 ]
Scamans, G. M. [1 ]
Fan, Z. Y. [1 ]
机构：
[1] Brunel Univ, BCAST, Uxbridge UB8 3PH, Middx, England
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2011年 / 27卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
Solidification; Grain refinement; Melt shearing; Direct chill casting; Magnesium alloy; ENHANCED HETEROGENEOUS NUCLEATION; AL BASED ALLOYS; MAGNESIUM ALLOYS; MICROSTRUCTURE; SOLIDIFICATION; MECHANISM; ALUMINUM; ADDITIONS; MCAST;
D O I：
10.1179/026708309X12578491814555
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Melt conditioning by advanced shear technology (MCAST) is a new process for microstructural refinement of both cast and wrought magnesium alloys. Melt conditioned direct chill (MCDC) casting combines the MCAST process with conventional direct chill (DC) casting. In the present work, melt conditioning has been combined with permanent mould casting to simulate the production of DC cast AZ91D billets and slabs. The results show that the MCDC process can achieve significantly finer grain size and more uniform microstructure than conventional DC process for both billets and slabs. Grain refinement in the MCDC process is due to the fine and well dispersed oxide particles produced after processing in the MCAST unit.
引用
收藏
页码：101 / 107
页数：7
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