期刊
SCRIPTA MATERIALIA
卷 116, 期 -, 页码 131-134出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.01.044
关键词
Titanium alloys; Phase transformations; High-resolution electron microscopy; Nano-scale instability; O ' phase
类别
资金
- National Science Foundation [DMR-1309270]
- JC Bose Fellowship of the Department of Science and Technology, Govt of India
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1309270] Funding Source: National Science Foundation
A nano-scale instability in the beta phase resulting in the formation of the disordered orthorhombic O' phase has been discovered in a fairly dilute binary Ti-Mo alloy, using selected area electron diffraction and high resolution scanning transmission electron microscopy. The O' phase informed in the alloy when the Mo content exceeds a critical value. The instability occurs in beta-solutionized samples that have been quenched to room temperature and is found to co-exist with athermal omega to phase. Interestingly, this nano-scale instability, involving the {110}<1<(1)over bar>0> soft-phonon shuffle, occurs in the beta phase without deliberate additions of either interstitial or substitutional solutes. (C) 2016 Elsevier Ltd. All rights reserved.
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