Acicular alpha(2) precipitation induced by capillarity at alpha/beta phase boundaries in Ti-14Al-2Zr-3Sn-3Mo-0.5Si titanium alloy

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	Acicular alpha(2) precipitation induced by capillarity at alpha/beta phase boundaries in Ti-14Al-2Zr-3Sn-3Mo-0.5Si titanium alloy
	A. J. Huang; G. P. Li; Y. L. Hao; R. Yang
	2003
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	51 期号:16 页码:4939-4952
摘要	The precipitation of alpha(2) phase based on Ti3Al from Ti-14Al-2Zr-3Sn-3Mo-0.5Si titanium alloy homogenized at different temperatures in the (alpha + beta) two-phase field has been characterized. Minimal lattice mismatch between the alpha and alpha(2) phase leads to a massive ordering transformation upon cooling and results in morphologies distinct from the ellipsoidal shape of the alpha(2) particles. Enrichment of At in front of growing beta grains due to the Gibbs-Thomson effect., together with preferential diffusion of At along <11 (2) over bar0> produces a layer of acicular alpha(2) particles apparently perpendicular to the alpha/beta phase boundaries. Removal of the capillarity-induced composition inhomogeneity by subsequent aging at 750 degreesC results in disappearance of the acicular shape of the alpha(2) particles. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, inst met res, titanium alloy lab, shenyang 110016, peoples r china.;huang, aj (reprint author), chinese acad sci, inst met res, titanium alloy lab, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Titanium Alloys Ordering Heterogeneous Nucleation Of Phased Precipitation Transmission Electron Microscopy (Tem) Ti-al Alloys Self-diffusion Behavior System Microstructure Temperature Growth Transformations Equilibria Evolution
URL	查看原文
WOS记录号	WOS:000185435400024
引用统计	被引频次：33[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35857
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	A. J. Huang,G. P. Li,Y. L. Hao,et al. Acicular alpha(2) precipitation induced by capillarity at alpha/beta phase boundaries in Ti-14Al-2Zr-3Sn-3Mo-0.5Si titanium alloy[J]. Acta Materialia,2003,51(16):4939-4952.
APA	A. J. Huang,G. P. Li,Y. L. Hao,&R. Yang.(2003).Acicular alpha(2) precipitation induced by capillarity at alpha/beta phase boundaries in Ti-14Al-2Zr-3Sn-3Mo-0.5Si titanium alloy.Acta Materialia,51(16),4939-4952.
MLA	A. J. Huang,et al."Acicular alpha(2) precipitation induced by capillarity at alpha/beta phase boundaries in Ti-14Al-2Zr-3Sn-3Mo-0.5Si titanium alloy".Acta Materialia 51.16(2003):4939-4952.