Lattice Dilatation and Hydrogen Embrittlement Cracking Available to Purchase

A complete elastic solution for the lattice dilatation at the tip of a sharp tensile crack has been compared with the more familiar one term solution. The maximum dilatation occurs in the crack plane, so an increased hydrogen solubility is to be expected in this plane. Because stress corrosion cracking by hydrogen embrittlement is often observed along planes inclined to the precrack plane, it is necessary to consider other factors which might influence the crack path. It is proposed that the other factor of major importance is the extensional stress perpendicular to the precrack plane, σ_y.