Dislocation dipole-induced strengthening in intermetallic TiAl

IMR OpenIR

	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.
	2018-01-15
发表期刊	SCRIPTA MATERIALIA
ISSN	1359-6462
卷号	143 页码:98-102
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.
部门归属	[he, yan ; liu, zhao ; zhou, gang ; wang, hao ; bai, chunguang ; xu, dongsheng ; yang, rui] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [he, yan] shenyang normal univ, coll phys & technol, shenyang 110034, liaoning, peoples r china ; [zhou, gang] dalian univ technol, sch mat sci & engn, dalian 116024, peoples r china ; [rodney, david] univ lyon 1, inst lumiere matiere, cnrs, umr 5306, f-69622 villeurbanne, france ; [appel, fritz] helmholtz zentrum geesthacht, inst mat res, d-21502 geesthacht, germany
关键词	Activation-relaxation Technique Characterizing Faulted Dipoles Atomistic Simulations Titanium Aluminides Deformation Transformation Dynamics Tensile Alloys
学科领域	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	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]
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79582
专题	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.