抄録
In order to investigate the influence of hydrogen on the mechanical properties of 50.15at% Ni-Ti alloy specimens with superelasticity, the stress-strain curves were measured for the specimens charged with hydrogen by cathodic polarization. The cathodic polarization was carried out at 100A/m^2 in an 0.5kmol/m^3 H_2SO_4 aqueous solution at 298K. Hydrogen in the specimens was analyzed by using the thermal desorption spectroscopy. Two peaks were observed in the thermal hydrogen evolution spectrums. The concentration of hydrogen was obtained from the area of the peaks. A marked decrease in elongation occured as the polarization time. This is attributed to an increase in the penetration depth of hydrogen.
