A Quantitative Description of Decreasing in Delayed Fracture Toughness of Metals Induced by Hydrogen
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Abstract:
Based on the concept of unification between strength theory and elastoplastic fracture criterion,and using the approximate solution for elastic-plastic plane stress-strain field in the vicinity of a blunt crack tip of power-law hardening materials,which was established by Chen Chi,a correction is made for both decohesion theory and hydrogen-facilitated local plastic deformation theory.The results from the two theories are found substancially identical.
