Plastic deformation via hierarchical nano-sized martensitic twinning in the metastable beta Ti-24Nb-4Zr-8Sn alloy

doi:10.1016/j.actamat.2020.04.021

IMR OpenIR

	Plastic deformation via hierarchical nano-sized martensitic twinning in the metastable beta Ti-24Nb-4Zr-8Sn alloy
	Yang, Y.1,2; Castany, P.1; Hao, Y. L.3; Gloriant, T.1
通讯作者	Castany, P.(philippe.castany@insa-rennes.fr)
	2020-08-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	194 页码:27-39
摘要	A superelastic metastable beta Ti-24Nb-4Zr-8Sn (wt.%) alloy is analyzed in the solution treated state after different applied strains in order to reveal evolution of microstructures and explore plastic deformation mechanisms. Deformation bands are observed by optical microscopy, EBSD and TEM. After 3% of strain, only few thin {332}<113>(beta) twins are observed, while after 5% of strain, complex hierarchically beta twinning structures composed of primary and secondary bands are observed by TEM. Indeed, very thin secondary {332}<113>(beta) twins are observed (about 50 nm in average) and their massive occurrence leads to the loss of the initial {332}<113>(beta) twinning relationship between matrix and primary bands which is transformed passively to an unusual type II <531>(beta) twinning relationship. Similarly, the orientation relationship between matrix and secondary twins tends to another abnormal type I {541}(beta) twinning relationship. As in situ synchrotron XRD experiments show that almost all the beta phase is transformed into alpha '' martensite under loading condition, a crystallographic reconstructing method is then used to determine the real alpha '' orientation before stress releasing. The relaxed {332}<113>(beta) twins is found to correspond perfectly to the reversion of {130}<310>(alpha '' )martensitic twins occurring under loading condition. The unusual twinning relationships between matrix and primary/secondary twins are shown to correspond to type II <512>(alpha '') and no twinning relationships in alpha '' martensite, respectively. Schmid factor analyses show that the activation of primary twins obeys the Schmid law. However, the activation of secondary twins disobeys the Schmid law due to the variant selection of alpha '' martensite occurring during primary twinning. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Metastable beta titanium Ti2448 alloy plastic deformation twinning secondary twinning alpha '' martensite
资助者	National Science Foundation for Young Scientists of China
DOI	10.1016/j.actamat.2020.04.021
收录类别	SCI
语种	英语
资助项目	National Science Foundation for Young Scientists of China[51801199]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000542971400003
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：52[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/321006/139518
专题	中国科学院金属研究所
通讯作者	Castany, P.
作者单位	1.Univ Rennes, CNRS, INSA Rennes, ISCR,UMR 6226, F-35000 Rennes, France 2.Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Peoples R China 3.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, Y.,Castany, P.,Hao, Y. L.,et al. Plastic deformation via hierarchical nano-sized martensitic twinning in the metastable beta Ti-24Nb-4Zr-8Sn alloy[J]. ACTA MATERIALIA,2020,194:27-39.
APA	Yang, Y.,Castany, P.,Hao, Y. L.,&Gloriant, T..(2020).Plastic deformation via hierarchical nano-sized martensitic twinning in the metastable beta Ti-24Nb-4Zr-8Sn alloy.ACTA MATERIALIA,194,27-39.
MLA	Yang, Y.,et al."Plastic deformation via hierarchical nano-sized martensitic twinning in the metastable beta Ti-24Nb-4Zr-8Sn alloy".ACTA MATERIALIA 194(2020):27-39.