Refinement effect of cerium, calcium and strontium in AZ91 magnesium alloy

被引：85
作者：
Liu, S. F. [1 ]
Li, B. [1 ]
Wang, X. H. [1 ]
Su, W. [1 ]
Han, H. [1 ]
机构：
[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2009年 / 209卷 / 08期
关键词：
AZ91 magnesium alloy; Cerium; Calcium; Strontium; Microstructure refinement; MG-AL ALLOYS; MECHANICAL-PROPERTIES; CORROSION BEHAVIOR; FRACTURE-BEHAVIOR; EARTH-ELEMENTS; CA ADDITION; MICROSTRUCTURE; RESISTANCE;
D O I：
10.1016/j.jmatprotec.2008.09.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Refinement effects of cerium (Ce), calcium (Ca) and strontium (Sr) additions to AZ91 magnesium alloy have been investigated. Results show that an addition of 0.8 wt.%Ce combined with either 0.2 wt.%Ca or 0.2 wt.%Sr has a significant refining effect, and a higher degree of refinement using Ce-Ca combination rather than Ce-Sr. EDS microanalysis and water-quenched microstructure observation were used to reveal the grain refinement mechanism. It is assumed that grain refinement is mainly due to the impeding effect on grain growth during solidification of Ce, Ca and Sr segregation on grain boundaries. (C) 2008 Published by Elsevier B.V.
引用
收藏
页码：3999 / 4004
页数：6
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