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
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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 | |
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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