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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
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume105Pages:114-120
AbstractThe 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.
description.department[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
KeywordNanotwins Ti-c Oriented Attachment Twin Boundary Transmission Electron Microscopy (Tem)
Funding OrganizationMSBRDP of China [2010CB631206]; NNSF of China [51371173, 51331005, 11332010]
Indexed Bysci
Language英语
WOS IDWOS:000370086500014
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75014
Collection中国科学院金属研究所
Corresponding Authorqzheng@imr.ac.cn
Recommended Citation
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.
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