期刊
SCRIPTA MATERIALIA
卷 150, 期 -, 页码 115-119出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.03.009
关键词
Titanium alloys; Twinning; Martensitic phase transformation; HAADF-STEM; Interfacial transition structure
类别
资金
- Natural Science Foundation of China [51171004, 11274027]
In this work, the boundary structure of the (332)< 113 >(beta) deformation twin in a deformed metastable beta-type Ti-Nb-Pd alloy has been clearly revealed by means of high-angle annular dark-field scanning transmission electron microscopy at atomic-resolution level. It is found that stress-induced alpha martensite structure remains in the {332}(beta) twin boundary region, exhibiting a gradual transition to the 13 structure with an orientation relationship of (1(3)over-bar0)(alpha)//(332)(beta). This finding provides a direct experimental evidence to verify that the formation of a (334 twin in deformed metastable (beta-type Ti-Nb-based alloys can be associated with a reversible beta-to-alpha martensitic transformation. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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