Hydrogen in Ti-V Alloys

Abstract

Titanium i s one of the metals whose mechanical pioperties a l e adversely effected by hydrogen absorption (1). Although alloying i s known to influence the behavioi of hydiogen in metals, the mechanism of what takes place i s generally not understood.Ti-Al-V alloys a r e extensively employeu i n modern technology, giving added incen-

Influence of vanadium on hydrogen diffusion and phase constitution in Ti–H

“…The high-concentration samples were in the y phase. Previously obtained results of the NMR absorption curves [12] are reproduced in Fig. 2 for easy reference.…”

“…The narrow portion of the absorption lines in Fig. 2 is due to motional narrowing caused by fast hydrogen diffusion [12]. This is born out in Fig.…”

“…There is thus no single activation energy defined and we can consider the vanadium atoms as detrapping centers. 33 Discussion of absorption traces I n a previous note [12] we speculated as to the reason why in the NMR absorption traces (Fig. 2) the ratio of the amplitude of narrow to wide line is much larger a t low than a t large hydrogen concentration.…”