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.
@article{arxiv.1907.01583,
title = {Could face-centered cubic titanium in cold-rolled commercially-pure titanium only be a Ti-hydride?},
author = {Yanhong Chang and Siyuan Zhang and Christian H. Liebscher and David Dye and Dirk Ponge and Christina Scheu and Gerhard Dehm and Dierk Raabe and Baptiste Gault and Wenjun Lu},
journal= {arXiv preprint arXiv:1907.01583},
year = {2019}
}