Ti has a high affinity for hydrogen and is a typical hydride formers. Ti-hydride are brittle phases which probably cause premature failure of Ti-alloys. Here, we used atom probe tomography and electron microscopy to investigate the hydrogen distribution in a set of specimens of commercially pure Ti, model and commercial Ti-alloys. Although likely partly introduced during specimen preparation with the focused-ion beam, we show formation of Ti-hydrides along {\alpha} grain boundaries and {\alpha}/\b{eta} phase boundaries in commercial pure Ti and {\alpha}+\b{eta} binary model alloys. No hydrides are observed in the {\alpha} phase in alloys with Al addition or quenched-in Mo supersaturation.
@article{arxiv.1803.04007,
title = {Characterizing solute hydrogen and hydrides in pure and alloyed titanium at the atomic scale},
author = {Yanhong Chang and Andrew J. Breen and Zahra Tarzimoghadam and Philipp Kürnsteiner and Hazel Gardner and Abigail Ackerman and Anna Radecka and Paul A. J. Bagot and Wenjun Lu and Tong Li and Eric A. Jägle and Michael Herbig and Leigh T. Stephenson and Michael P. Moody and David Rugg and David Dye and Dirk Ponge and Dierk Raabe and Baptiste Gault},
journal= {arXiv preprint arXiv:1803.04007},
year = {2018}
}