Effect of DH treatment on microstructure and mechanical properties of an LM28-0.3wt.% Nd hypereutectic aluminum silicon alloy

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	Effect of DH treatment on microstructure and mechanical properties of an LM28-0.3wt.% Nd hypereutectic aluminum silicon alloy
其他题名	Effect of DH treatment on microstructure and mechanical properties of an LM28-0.3wt.%Nd hypereutectic aluminum silicon alloy
	Gao Bo; Chen Lei; Yu Fuxiao; Sun Shuchen; Tu Ganfeng
	2007
发表期刊	RARE METALS
ISSN	1001-0521
卷号	26 期号:6 页码:578-583
摘要	In this article, a novel heat treatment method, deformation heat (DH) treatment (extrusion + aging), was employed on a hypereutectic aluminum silicon alloy (LM28-0.3wt.%Nd), and its effect on microstructure and mechanical properties of this alloy was investigated. It can be concluded that the eutectic microstructure disappears after the DH treatment, in the meantime the morphology of alpha(Al) solid solution was transformed from fir-tree and cellular to equiaxed, Si was refined with grain sizes of about 1-10 mu m and distributed dispersedly, even some of them became globular shape, which can reduce stress accumulation effectively. Mechanical properties test indicated that the DH treatment could significantly improve the room-temperature strength and have little effect on the high-temperature strength of LM28-0.3wt.%Nd alloy. The fracture mechanism is ductile fracture by fracture morphology analysis.
其他摘要	In this article, a novel heat treatment method, deformation heat (DH) treatment (extrusion + aging), was employed on a hypereutectic aluminum silicon alloy (LM28-0.3wt.%Nd), and its effect on microstructure and mechanical properties of this alloy was investigated. It can be concluded that the eutectic microstructure disappears after the DH treatment, in the meantime the morphology of α(Al) solid solution was transformed from fir-tree and cellular to equiaxed, Si was refined with grain sizes of about 1-10 μm and distributed dispersedly, even some of them became globular shape, which can reduce stress accumulation effectively. Mechanical properties test indicated that the DH treatment could significantly improve the room-temperature strength and have little effect on the high-temperature strength of LM28-0.3wt.%Nd alloy. The fracture mechanism is ductile fracture by fracture morphology analysis.
关键词	AL-SI Al-Si alloys Nd deformation heat treatment mechanical properties
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:3115311
引用统计	被引频次：2[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/144736
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Gao Bo,Chen Lei,Yu Fuxiao,et al. Effect of DH treatment on microstructure and mechanical properties of an LM28-0.3wt.% Nd hypereutectic aluminum silicon alloy[J]. RARE METALS,2007,26(6):578-583.
APA	Gao Bo,Chen Lei,Yu Fuxiao,Sun Shuchen,&Tu Ganfeng.(2007).Effect of DH treatment on microstructure and mechanical properties of an LM28-0.3wt.% Nd hypereutectic aluminum silicon alloy.RARE METALS,26(6),578-583.
MLA	Gao Bo,et al."Effect of DH treatment on microstructure and mechanical properties of an LM28-0.3wt.% Nd hypereutectic aluminum silicon alloy".RARE METALS 26.6(2007):578-583.