Abstract
Titanium and its alloys could be called the “streetwalker” among
commercially applied metals, because its poor nobility allows it to
“pick-up” anything. Titanium is one of the metals that forms very stable
borides, carbides, nitrides, oxides, and even hydrides. The solubility
of nitrogen and oxygen in the hexagonal crystal structure of (metallic)
titanium is very high; on the other end limited quantities of boron,
carbon, and hydrogen can be dissolved. In the present contribution, we
report on a significant increase in the solid solution limit of hydrogen
in hexagonal close-packed (h.c.p.) titanium, where the h.c.p. crystal
lattice is stabilized by deliberate interstitial alloying with high
quantities of nitrogen or oxygen atoms. The presence of nitrogen/oxygen
prevents the hydrogen-induced transformation of the h.c.p. titanium
lattice to a face-centered cubic (f.c.c.) titanium lattice that occurs
if no oxygen or nitrogen is present. The hydrogen content that can be
accommodated at room temperature in h.c.p. titanium is as high as an
unprecedented 50 at. pct from about 0 at. pct and causes an anisotropic
expansion of the hexagonal lattice. This finding showcases that there
could be an unexploited potential for combining large quantities of
interstitials in titanium-based lattices.
| Original language | English |
|---|---|
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 52 |
| Pages (from-to) | 4997–5003 |
| ISSN | 1073-5623 |
| DOIs | |
| Publication status | Published - 2021 |
Bibliographical note
Please not correction: https://link.springer.com/article/10.1007%2Fs11661-021-06553-6After publication of this article the first sentence of the abstract was changed by the authors to read "Titanium and its alloys are very reactive and have a high affinity to interstitial elements.” The original sentence contained inappropriate language. Neither Metallurgical and Materials Transactions A nor the publisher in any way endorse the use of this language.