Hydrogen trapping in aged {beta}-titanium alloys
- SRI International, Menlo Park, CA (United States). Materials Research Center
Hydrogen trapping in three {beta}-titanium alloys (unaged and aged Ti-15V-3Cr-3Al-3Sn and Beta-21S, and partially aged Beta-C) was investigated using a potentiostatic pulse technique. The apparent trapping constant ({kappa}{sub a}) and hydrogen entry flux were determined for each alloy in 1 mol l{sup {minus}1} acetic acid/1 mol l{sup {minus}1} sodium acetate. The results were compared with those for other {beta}-Ti alloys (Ti-10V-2Fe-3Al, Ti-13V-11Cr-3Al and fully aged Beta-C) studied previously. Aging caused a negligible change in {kappa}{sub a} for Ti-15-3, whereas a marked increase was observed for Beta-21S and the other {beta}-Ti alloys. Among the aged alloys, Ti-13-11-3 had the highest value of {kappa}{sub a} and Ti-15-3 had the lowest value. The intrinsic susceptibilities of Beta-C and Beta-21S to hydrogen embrittlement (HE), as represented by the trapping constants, were comparable and significantly higher than that of Ti-15-3. The susceptibilities were consistent with the relative resistances to HE observed for these alloys.
- OSTI ID:
- 509140
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 5 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
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