Investigation of a nano-scale, incommensurate, modulated domain in a Ti-Fe alloy

SCRIPTA MATERIALIA

卷:154

Article

Zheng, Yufeng¹  Huber, Daniel²  Fraser, Hamish L.¹ 

[1] Ohio State Univ, Dept Mat Sci & Engn, Ctr Accelerated Maturat Mat, 1305 Kinnear Rd, Columbus, OH 43212 USA

[2] Ohio State Univ, Ctr Electron Microscopy & Anal, 1305 Kinnear Rd, Columbus, OH 43212 USA

关键词: Titanium alloys;    Phase transformations;    Incommensurate modulated domain;    Scanning transmission electron microscopy;    Ti-Fe alloy;   

DOI  :  10.1016/j.scriptamat.2018.06.010

来源: Elsevier

【 摘 要 】

The microstructure of a Ti-Fe compositional gradient sample was investigated using transmission electron microscopy (TEM) and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM). Different combinations of phases were observed to form depending on the local concentration of Fe. Interestingly, a nano-scale incommensurate modulated domain was detected in the alloy containing approximately 13.8 to 33.9 wt% Fe using selected area diffraction (SAD). The observed disordered structure with no fixed long range periodicity in the nano-scale incommensurate modulated domain in aberration-corrected HAADF-STEM imaging was found not related to the shuffle mechanism of the to phase. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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