Shuffle-induced modulated structure and heating-induced ordering in the metastable β-titanium alloy, Ti-5Al-5Mo-5V-3Cr

SCRIPTA MATERIALIA

卷:176

Article

Zheng, Yufeng^1,2,3  Antonov, Stoichko⁴  Feng, Qiang⁴  Banerjee, Rajarshi^5,6  Banerjee, Dipankar⁷  Fraser, Hamish L.^1,2 

[1] Ohio State Univ, Ctr Accelerated Maturat Mat, Columbus, OH 43212 USA

[2] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43212 USA

[3] Univ Nevada, Dept Chem & Mat Engn, 1664 N Virginia St, Reno, NV 89557 USA

[4] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, State Key Lab Adv Met & Mat, Beijing, Peoples R China

[5] Univ North Texas, Mat Res Facil, Denton, TX 76207 USA

[6] Univ North Texas, Dept Mat Sci & Engn, Denton, TX 76207 USA

[7] Indian Inst Sci, Dept Mat Engn, Bengaluru 560012, Karnataka, India

关键词: Titanium alloys;    Modulated structure;    Ordering;    High resolution transmission electron microscopy;    Atom probe tomography;   

DOI  :  10.1016/j.scriptamat.2019.09.027

来源: Elsevier

【 摘 要 】

A nano-scaled shuffle-induced modulated structure and heating-induced ordering have been characterized in a metastable beta-titanium alloy, Ti-5Al-5Mo-5V-3Cr, and their inter-relationship was investigated through in-situ and ex-situ conventional and aberration-corrected scanning/transmission electron microscopy and atom probe tomography. The nano-scaled O' phase with a disordered orthorhombicmodulated structure formed by the {O11} < 01 <(1)over bar>>beta transverse phonon was characterized for the first time to be stable from room temperature to similar to 200 degrees C. The O '' phase with an ordered orthorhombic structure formed from the beta phase during aging above the O' phase solvus temperature, where Al segregation in nano-scaled regions led to ordering of every third {011} planes. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free