Grain refining mechanisms in Mg-Al alloys with Al4C3 microparticles

被引：59

作者：

Nimityongskul, Sunya ^{[1
]}

Jones, Milton ^{[1
]}

Choi, Hongseok ^{[1
]}

Lakes, Roderic ^{[2
]}

Kou, Sindo ^{[3
]}

Li, Xiaochun ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Mech Engn, Madison, WI 53706 USA

[2] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

[3] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 7-8期

基金：

美国国家科学基金会;

关键词：

Mg alloys; Grain refining mechanism; Aluminum carbide; MAGNESIUM ALLOYS; CARBON ADDITION; REFINEMENT;

D O I：

10.1016/j.msea.2009.12.030

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Experiments were conducted to examine the grain refining mechanisms in AM60B, pure Mg, and Mg-6%Al with the addition of 5 wt% aluminum carbide (Al4C3). Grain refinement was observed in the AM60B and pure Mg with the addition of 5 wt%Al4C3 via two different mechanisms respectively, i.e. duplex nucleation hypothesis (Al4C3 -> Al8Mn5 -> alpha-Mg) in AM60B and Al4C3 nuclei hypothesis (Al4C3 -> alpha-Mg) in pure Mg. It is suggested that Mn is required to facilitate significant grain refinement in Mg-Al alloys containing >= 6% Al due to the segregating behavior of Al4C3 Particles to the solid-liquid (S-L) interface. Mechanical properties (yield strength, tensile strength, ductility, and microhardness) were enhanced by the addition of Al4C3 to AM60B alloy. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2104 / 2111

页数：8

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