Deformation twinning-induced single-variant ω-plates in metastable β-Ti alloys containing athermal ω-precipitates

doi:10.1007/s10853-020-05706-z

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	Deformation twinning-induced single-variant ω-plates in metastable β-Ti alloys containing athermal ω-precipitates
	Chen, Wei 2; Li, Keer 2; Yu, Guoxiang 2; Ren, Junqiang 1; Zha, You 2; Sun, Jun 2
刊名	Journal of Materials Science
	2021-04-01
卷号	56 期号:12 页码:7710-7726
关键词	Chromium alloys Deformation Twinning Deformation microstructure Deformation twinning Formation characteristics Formation mechanism Metastabilities Micro-structural Research interests Twin morphology
ISSN号	00222461
DOI	10.1007/s10853-020-05706-z
英文摘要	The ω-phase in metastable β-titanium (Ti) alloys attracts great research interests owing to the metastability and the involved microstructural complexity upon straining, while the fundamental understanding on its formation mechanism is still insufficient. In this study, deformation-induced ω-plates have been systematically investigated using Ti-10 wt% Cr metastable β-Ti alloy containing athermal ω-precipitates. It is found that single-variant ω-plates form either along {332}β twin interfaces or in the twin interiors, which closely depends on twin morphologies. For the acicular β-twin, the ω-plate appears in the twin interiors accompanied by high density of parallel straight dislocations, while for the lenticular twin, the ω-plate attaches to the twin interface without the surrounding dense parallel straight dislocations. These unique formation characteristics result from local stress field induced by the twinning itself and the passive transformation of athermal ω-precipitates. It is further revealed that the passive transformation of athermal ω-precipitates dominates the formation of ω-plates inside the acicular twins, while it is the locally preferential twin thickening that promotes the ω-plates to form along the lenticular twin interfaces. These findings provide new insight into deformation-induced ω-phase transformation and the intricate deformation microstructures in metastable β-Ti alloys. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.
WOS研究方向	Materials Science
语种	英语
出版者	Springer
WOS记录号	WOS:000609396200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150933]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China 2.State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an; 710049, China;
推荐引用方式 GB/T 7714	Chen, Wei,Li, Keer,Yu, Guoxiang,et al. Deformation twinning-induced single-variant ω-plates in metastable β-Ti alloys containing athermal ω-precipitates[J]. Journal of Materials Science,2021,56(12):7710-7726.
APA	Chen, Wei,Li, Keer,Yu, Guoxiang,Ren, Junqiang,Zha, You,&Sun, Jun.(2021).Deformation twinning-induced single-variant ω-plates in metastable β-Ti alloys containing athermal ω-precipitates.Journal of Materials Science,56(12),7710-7726.
MLA	Chen, Wei,et al."Deformation twinning-induced single-variant ω-plates in metastable β-Ti alloys containing athermal ω-precipitates".Journal of Materials Science 56.12(2021):7710-7726.