Could face-centered cubic titanium in cold-rolled commercially-pure titanium only be a Ti-hydride?

SCRIPTA MATERIALIA

卷:178

Article

Chang, Yanhong¹  Zhang, Siyuan¹  Liebscher, Christian H.¹  Dye, David²  Ponge, Dirk¹  Scheu, Christina¹  Dehm, Gerhard¹  Raabe, Dierk¹  Gault, Baptiste^1,2  Lu, Wenjun¹ 

[1] Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany

[2] Imperial Coll, Royal Sch Mines, Dept Mat, Prince Consort Rd, London SW7 2BP, England

关键词: Cold-rolled pure Ti;    Electropolishing;    FCC phase;    Scanning transmission electron microscopy (STEM);    Electron energy loss spectroscopy (EELS);    Atom probe tomography (APT);   

DOI  :  10.1016/j.scriptamat.2019.11.010

来源: Elsevier

【 摘 要 】

A face-centered cubic (FCC) phase in electro-polished specimens for transmission electron microscopy of commercially pure titanium has sometimes been reported. Here, a combination of atom-probe tomography, scanning transmission electron microscopy and low-loss electron energy loss spectroscopy is employed to study both the crystal structural and chemical composition of this FCC phase. Our results prove that the FCC phase is actually a TiHx (x >= 1) hydride, and not a new allotrope of Ti, in agreement with previous reports. The formation of the hydride is discussed. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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