Effects of scandium additions on mechanical properties of cellular Al-based foams

被引：47

作者：

Huang, Li ^{[2
]}

Wang, Hui ^{[2
]}

Yang, Donghui ^{[1
,3
]}

Ye, Feng ^{[2
]}

Lu, Z. P. ^{[2
]}

机构：

[1] Hohai Univ, Coll Mech & Mat, Nanjing 210098, Jiangsu, Peoples R China

[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[3] N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA

来源：

INTERMETALLICS | 2012年 / 28卷

基金：

高等学校博士学科点专项科研基金;

关键词：

Rare-earth intermetallics; Precipitates; Heat treatment; Grain-boundary character distribution; Mechanical properties; ALUMINUM FOAMS; MICROSTRUCTURE; BEHAVIOR; METALS;

D O I：

10.1016/j.intermet.2012.03.050

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：

By using titanium hydride as the blowing agent and Ca particles as the thickening agent, the cellular Al-0.24wt.%Sc and Al-0.41wt.%Sc foams with a porosity ranging from 48 to 86% were successfully fabricated via the melt-foaming method. The compressive behaviors and effects of minor Sc additions on the strengthening mechanism of the cellular Al-Sc alloy foams were investigated and discussed. The results show that minor Sc additions can dramatically improve the compressive strength of the cellular Al foams due to the grain refinement and pinning effect from the Al3Sc precipitates homogeneously distributed in the matrix after heat treatment, implying that the Sc addition coupled with proper heat treatment is an effective way to improve the mechanical performance for Al-based alloy foams. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：71 / 76

页数：6

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