Dislocation dipole-induced strengthening in intermetallic TiAl

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	Dislocation dipole-induced strengthening in intermetallic TiAl
	He, Y; Liu, Z; Zhou, G; Wang, H; Bai, CG; Rodney, D; Appel, F; Xu, DS; Yang, R; Wang, H (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
刊名	SCRIPTA MATERIALIA
	2018-01-15
卷号	143 页码:98-102
关键词	Activation-relaxation Technique Characterizing Faulted Dipoles Atomistic Simulations Titanium Aluminides Deformation Transformation Dynamics Tensile Alloys
ISSN号	1359-6462
英文摘要	Narrow dislocation dipoles in intermetallic TiAl are systematically investigated by atomic-scale simulations and electron microscopy. The formation energy of narrow dipolar configurations and the activation energy during their evolution are unraveled. We show that faulted dipoles can be stable over experimental timescales, in full agreement with high-resolution observations. Such stable atomic-scale structures provide a strengthening effect significantly larger than the elastic prediction, which deeply influences plasticity in TiAl. (C) 2017 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.; Narrow dislocation dipoles in intermetallic TiAl are systematically investigated by atomic-scale simulations and electron microscopy. The formation energy of narrow dipolar configurations and the activation energy during their evolution are unraveled. We show that faulted dipoles can be stable over experimental timescales, in full agreement with high-resolution observations. Such stable atomic-scale structures provide a strengthening effect significantly larger than the elastic prediction, which deeply influences plasticity in TiAl. (C) 2017 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.
学科主题	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
资助机构	National Key Research and Development Program of China [2016YFB0701304]; Natural Science Foundation of China [51671195]; Youth Innovation Promotion Association of Chinese Academy of Sciences [2015151]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79582]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, H (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	He, Y,Liu, Z,Zhou, G,et al. Dislocation dipole-induced strengthening in intermetallic TiAl[J]. SCRIPTA MATERIALIA,2018,143:98-102.
APA	He, Y.,Liu, Z.,Zhou, G.,Wang, H.,Bai, CG.,...&Wang, H .(2018).Dislocation dipole-induced strengthening in intermetallic TiAl.SCRIPTA MATERIALIA,143,98-102.
MLA	He, Y,et al."Dislocation dipole-induced strengthening in intermetallic TiAl".SCRIPTA MATERIALIA 143(2018):98-102.