Duplex nucleation in Mg-Al-Zn-Mn alloys with carbon inoculation

被引：22
|
作者：
Han, Guang [1 ]
Liu, Xiangfa [1 ]
机构：
[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 487卷 / 1-2期
关键词：
Metals and alloys; Microstructure; Transmission electron microscopy (TEM); Al0.89Mn1.11; Al8Mn5; Al4C3; GRAIN REFINING MECHANISM; REFINEMENT; MAGNESIUM; AZ31;
D O I：
10.1016/j.jallcom.2009.08.037
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Duplex nucleation in Mg-Al-Zn-Mn alloys with carbon inoculation was investigated in this study. Carbon addition brought remarkable grain refinement to both AZ31 (Mg-3Al-1Zn-0.45Mn) and AZ63 (Mg-6Al-3Zn-0.35Mn). Al4C3-coated Al0.89Mn5 and Al4C3-coated Al8Mn5 act as the duplex nucleation sites in carbon-treated AZ31 and AZ63, respectively. The morphologies and sizes of dominant Al-Mn phases in both alloys (Al0.89Mn1.11 in AZ31 and Al8Mn5 in AZ63) did not change significantly after grain refinement of the alloys, and these Al-Mn particles are believed to have low nucleating efficiency for primary alpha-Mg. In contrast, Al4C3, the interfacial phase between primary a-Mg and duplex nucleating particles, is the direct potent nucleating substrate for primary alpha-Mg. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：194 / 197
页数：4
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