Hydrogen Embrittlement of Solution Heat-Treated and Aged β-Titanium Alloys Ti-15% V-3% Cr-3% Al-3% Sn and Ti-15% Mo-3% Nb-3% Al
- 1 December 1994
- journal article
- Published by Association for Materials Protection and Performance (AMPP) in Corrosion
- Vol. 50 (12) , 919-933
- https://doi.org/10.5006/1.3293483
Abstract
Effects of electrochemically introduced hydrogen (H) on the room-temperature mechanical properties of two β-titanium (Ti) alloys were compared. Solution heat-treated (SHT), single-step peak-aged (PA), and duplex-aged (DA) conditions were investigated using notched tensile bars and Bridgman's analysis of longitudinal stress and average effective diametral plastic strain. Ti-15% molybdenum (Mo)-3% niobium (Nb)-3% aluminum (Al) (referred to as 21S) was more susceptible to hydrogen embrittlement (HE) than Ti-15% vanadium (V)-3% chromium (Cr)-3% Al-3% Sn (tin) (composition in wt%, referred to as 15-3) based on reductions in longitudinal stress, plastic strain, and fractography at H concentrations > 1,000 ppm by weight. Hydriding of the α or β phase was not observed over the range of H concentrations investigated. Instead, changes in fracture behavior with H were correlated with deformation behavior and α precipitation. Susceptibility of 21S was attributed to a high-temperature, long solution treatment...Keywords
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