Output details

A viscoplastic study of crack-tip deformation and crack growth in a nickel-based superalloy at elevated temperature

This is the first paper reporting a comprehensive treatment of time-dependent crack growth utilising the concept of strain ratchetting, originally proposed by the authors (Zhao et al, FFEMS, 2004) for time-independent deformation. Ratchetting strain was used, for the first time, as a fracture criterion for time-dependent crack growth, an important step forward from the traditionally empirical or semi-empirical models. The work has spurred the first attempt at experimental validation of ratchetting phenomenon, in collaboration with the University of Sheffield and Ecole Polytechnique.