Nano-scale structural non-uniformities in gum like Ti-24Nb-4Zr-8Sn metastable β-Ti alloy

SCRIPTA MATERIALIA

卷:158

Article

Liang, Qianglong^1,2,3  Zheng, Yufeng^2,3  Wang, Dong¹  Hao, Yulin⁴  Yang, Rui⁴  Wang, Yunzhi^2,3  Fraser, Hamish L.^2,3 

[1] Xi An Jiao Tong Univ, Ctr Microstruct Sci, Frontier Inst Sci & Technol, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China

[2] Ohio State Univ, Ctr Accelerated Maturat Mat, 1305 Kinnear Rd,Suite 100, Columbus, OH 43212 USA

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

[4] Chinese Acad Sci, Inst Met Res, Shenyang, Liaoning, Peoples R China

关键词: Titanium alloys;    Phase transformations;    High-resolution electron microscopy;    omega phase;    O ' phase;   

DOI  :  10.1016/j.scriptamat.2018.08.043

来源: Elsevier

【 摘 要 】

Phase instabilities in a recently developed gum like alloy, Ti-24Nb-4Zr-8Sn (Ti2448), were investigated using conventional and aberration-corrected scanning/transmission electron microscopy. Athermal omega (hexagonal) and O' (orthorhombic) phases were found to be present in the alloy following solution treatment. A partial collapse of {111}(beta) atom planes was observed in the to phase, and a shuffle of every other {011}(beta) atom planes along < 0 (1) over bar1 >(beta) was observed in the O' phase particle. The presence of both the omega and O' phases in Ti2448 may influence the transition behavior under loading and may have significant impact on its mechanical properties. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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