Application of rapid solidification powder metallurgy to the fabrication of high-strength, high-ductility Mg-Al-Zn-Ca-La alloy through hot extrusion

被引：60

作者：

Ayman, Elsayed ^{[1
]}

Junko, Umeda ^{[2
]}

Katsuyoshi, Kondoh ^{[2
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Joining & Welding Res Inst, Osaka 5670047, Japan

来源：

ACTA MATERIALIA | 2011年 / 59卷 / 01期

关键词：

Magnesium alloys; Rare earth; Rapid solidification; Powder processing; Mechanical properties; MAGNESIUM ALLOY; TENSILE PROPERTIES; GRAIN-SIZE; TEXTURE; MICROSTRUCTURE; IMPROVEMENT; CERIUM; SHEET;

D O I：

10.1016/j.actamat.2010.09.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and mechanical properties of hot extruded Mg-7Al-1Zn-1Ca powder alloys with an addition of 1 5% La or 3 3% La were investigated Both rapidly solidified powders, produced via spinning water atomization process, and cast billets were extruded at 573, 623 and 673 K to optimize the processing conditions for obtaining better mechanical response Powders were consolidated using both cold compaction and spark plasma sintering The tensile properties of the extruded alloys were then evaluated and correlated to their microstructures The results showed that the use of rapidly solidified Mg-7Al-1Zn-1Ca alloy powders with La additions could lead to effective grain refinement and super saturation of alloying elements, which in turn resulted in the improved mechanical response The Mg-7Al-1Zn-1Ca-1 5La alloy extruded at 573 K attained ultimate tensile strength of 450 +/- xx MPa and elongation of 17 +/- xx%, superior to the Mg-7Al-1Zn-1Ca-3 3La alloy and other Mg alloys like Mg-Al-Mn-Ca This may help extend the application of Mg alloys to higher load-carrying parts while maintaining the excellent advantage of light weight (C) 2010 Acta Materialia Inc Published by Elsevier Ltd All rights reserved

引用

页码：273 / 282

页数：10

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