中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Phase-field simulation of twin boundary fractions in fully lamellar TiAl alloys

文献类型:期刊论文

作者C. Y. Teng ; N. Zhou ; Y. Wang ; D. S. Xu ; A. Du ; Y. H. Wen ; R. Yang
刊名Acta Materialia
出版日期2012
卷号60期号:18页码:6372-6381
关键词Nucleation of phase transformations Elastic behavior Titanium aluminides Precipitation Phase-field models resolution electron-microscopy gamma-titanium aluminides computer-simulation microstructural development gamma-alpha(2) interfaces intermetallic alloys deformation twins slip transfer al alloys nucleation
ISSN号1359-6454
中文摘要The phenomenon of high twin boundary fractions found experimentally for neighboring gamma lamellae in fully lamellar TiAl alloys was investigated by phase-field simulations. The nucleation and growth processes during alpha(2)' -> alpha(2) + gamma transformation that leads to the lamellar structure were simulated. In particular, the effects of coherency stress and the interfacial energy difference among different types of interfaces and undercooling on the nucleation mechanism were analyzed. It is found that the twin boundary fraction increases with increasing coherency elastic strain energy and increasing interfacial energy difference among different types of interfaces, and with decreasing undercooling. Depending on the relative contributions of these factors, the nucleation events simulated by the Langevin noises could be collective, correlated or independent. These findings could shed light on the control of twin boundary fraction within lamellar structures by adjusting alloy composition and cooling route. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
原文出处://WOS:000310663300014
公开日期2013-02-05
源URL[http://ir.imr.ac.cn/handle/321006/60263]  
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
C. Y. Teng,N. Zhou,Y. Wang,et al. Phase-field simulation of twin boundary fractions in fully lamellar TiAl alloys[J]. Acta Materialia,2012,60(18):6372-6381.
APA C. Y. Teng.,N. Zhou.,Y. Wang.,D. S. Xu.,A. Du.,...&R. Yang.(2012).Phase-field simulation of twin boundary fractions in fully lamellar TiAl alloys.Acta Materialia,60(18),6372-6381.
MLA C. Y. Teng,et al."Phase-field simulation of twin boundary fractions in fully lamellar TiAl alloys".Acta Materialia 60.18(2012):6372-6381.

入库方式: OAI收割

来源:金属研究所

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