Nanotwinned Ti(O,C) induced by oriented attachment in a hot-pressed Nb-Ti-Al alloy

IMR OpenIR

	Nanotwinned Ti(O,C) induced by oriented attachment in a hot-pressed Nb-Ti-Al alloy
	Shi, Zhiwu; Wei, Hua; Zhang, Hongyu; Jin, Tao; Sun, Xiaofeng; Zheng, Qi; qzheng@imr.ac.cn
	2016
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	105 页码:114-120
摘要	The microstructures and formation mechanisms of various kinds of Ti(O,C) twins in a Nb-23Ti-15Al alloy have been investigated. The crystallographic features of the twins are systematically characterized using transmission electron microscopy (TEM). Lamellar or corner Ti(O,C) twins consist of coherent {111} twin boundaries (TBs) and incoherent {112} TBs. The three-fold Ti(O,C) twins are newly found, with symmetric Sigma 9 {114} or asymmetric 29 {115}/{111} serving as the secondary TBs. Moreover, slabs on Ti(O,C) TBs showing three-layer periodic contrasts are identified to be the twin overlapping. According to the microstructure characteristics, we propose a new model based on oriented attachment to interpret the formation of Ti(O,C) twins, which involves the contact, rotation, attachment and Ostwald ripening of Ti(O,C) grains. Our results provide new insights on the formation mechanisms of nanotwinned grains. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[shi, zhiwu ; wei, hua ; zhang, hongyu ; jin, tao ; sun, xiaofeng ; zheng, qi] chinese acad sci, inst met res, superalloys div, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Nanotwins Ti-c Oriented Attachment Twin Boundary Transmission Electron Microscopy (Tem)
资助者	MSBRDP of China [2010CB631206]; NNSF of China [51371173, 51331005, 11332010]
收录类别	sci
语种	英语
WOS记录号	WOS:000370086500014
引用统计	被引频次：6[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/321006/75014
专题	中国科学院金属研究所
通讯作者	qzheng@imr.ac.cn
推荐引用方式 GB/T 7714	Shi, Zhiwu,Wei, Hua,Zhang, Hongyu,et al. Nanotwinned Ti(O,C) induced by oriented attachment in a hot-pressed Nb-Ti-Al alloy[J]. ACTA MATERIALIA,2016,105:114-120.
APA	Shi, Zhiwu.,Wei, Hua.,Zhang, Hongyu.,Jin, Tao.,Sun, Xiaofeng.,...&qzheng@imr.ac.cn.(2016).Nanotwinned Ti(O,C) induced by oriented attachment in a hot-pressed Nb-Ti-Al alloy.ACTA MATERIALIA,105,114-120.
MLA	Shi, Zhiwu,et al."Nanotwinned Ti(O,C) induced by oriented attachment in a hot-pressed Nb-Ti-Al alloy".ACTA MATERIALIA 105(2016):114-120.