Abstract
Fatigue tests were carried out on notched specimens of Ti13V11Cr3Al and Ti15V3Cr3Al3Sn alloys under electrolytic hydrogen-charging in H 2SO 4 aqueous solution. For the Ti13V11Cr3Al alloy the fatigue crack propagation rate da dN under hydrogen charging is larger than that in air especially when the range of stress intensity factor ΔK is small. For Ti15V3Cr3Al3Sn alloy the da dN under hydrogen charging is a little smaller than that in air when ΔK is medium and da dN under hydrogen charging approaches that in air with further decrease in ΔK.
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