Microstructure evolution and room temperature deformation of a unidirectionally solidified Nb-22Ti-16Si-3Ta-2Hf-7Cr-3Al-0.2Ho (at.%) alloy

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	Microstructure evolution and room temperature deformation of a unidirectionally solidified Nb-22Ti-16Si-3Ta-2Hf-7Cr-3Al-0.2Ho (at.%) alloy
	G. M. Cheng ; L. L. He
刊名	Intermetallics
	2011
卷号	19 期号:2 页码:196-201
关键词	Composites Deformation-induced Electron microscopy Rapid solidification processing recrystallization-induced) transmission Microstructure (as-cast. Fracture toughness Yield stress in-situ composites silicide-based composites orientation relationship interfacial structure fracture-toughness alpha-nb5si3 additions ceramics strength
ISSN号	0966-9795
中文摘要	Unidirectional solidification (DS) experiments were performed on a Nb-22Ti-16Si-3Ta-2Hf-7Cr-3Al-0.2Ho (at.%) alloy and the growth rates were selected as 6, 10 and 16 mm/h, respectively. The effect of solidification rates on the microstructure development and room temperature deformation was investigated. The DS alloys were mainly composed of Nb solid solution (Nbss) and Nb(5)Si(3) phases. All the Nbss/Nb(5)Si(3) eutectic colonies aligned well along the growth direction of the DS specimens. A small amount of hex-Nb(5)Si(3) phase was identified as intergranular phase when observed from the transverse section of the DS specimens. There was an orientation relationship between Nbss and hex-Nb(5)Si(3), which was determined as [111](Nb)//[22 (4) over bar3](h) and the two almost parallel planes of (1 (1) over bar0)(Nb)//(1 (1) over bar 00)(h) with an include angle about 2.2 degrees. The DS alloys showed improved room temperature compressive strength and fracture toughness as compared with the casting alloy. (C) 2010 Published by Elsevier Ltd.
原文出处	://WOS:000286294500014
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/30282]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	G. M. Cheng,L. L. He. Microstructure evolution and room temperature deformation of a unidirectionally solidified Nb-22Ti-16Si-3Ta-2Hf-7Cr-3Al-0.2Ho (at.%) alloy[J]. Intermetallics,2011,19(2):196-201.
APA	G. M. Cheng,&L. L. He.(2011).Microstructure evolution and room temperature deformation of a unidirectionally solidified Nb-22Ti-16Si-3Ta-2Hf-7Cr-3Al-0.2Ho (at.%) alloy.Intermetallics,19(2),196-201.
MLA	G. M. Cheng,et al."Microstructure evolution and room temperature deformation of a unidirectionally solidified Nb-22Ti-16Si-3Ta-2Hf-7Cr-3Al-0.2Ho (at.%) alloy".Intermetallics 19.2(2011):196-201.