Abstract
The phase transformation behavior of the metastable beta phase in hydrogen charged Ti-Mo alloys was investigated using electrical resistivity and X-ray diffraction techniques. Hydrogen charging was found to have little effect on athermal omega phase formation in a highly susceptible alloy (16 wt pct Mo) but suppressed athermal omega in alloys with compositions near the critical composition for the transition to diffuse (incommensurate) type omega (∼20 wt pct Mo). No evidence was found for a hydrogen induced omega phase in a concentrated alloy (30 wt pct Mo). The incipient stages of the beta + beta’ phase separation in Ti-30 wt pct Mo were detected after aging slightly below the beta transus.
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