Effect of interstitial impurities on the crack resistance of ductile titanium alloys. 2

We have investigated the failure ductility of a 2V-type ductile titanium alloy with a nitrogen and oxygen impurity content ranging from 0.05 to 0.35%. Here we have employed approaches that are based on utilization of the J integral. We have established the optimum values for nitrogen and oxygen impurity concentrations to ensure an adequate level of crack resistance and stress. We have proposed relationships for the calculation of microspall resistance, based on the geometric parameters of the structure when the a phase is laminar in form. The analytical determination of microspall resistance made it possible to estimate the crack resistance of the alloy to a high degree of accuracy over the entire range of variations in impurities, based on empirical relationships.Translated from Problemy Prochnosti, No. 8, pp. 30–36, August, 1991.