International Seminar on Mechanics and Mechanisms of Solid-Solid Phase Transformations
J. Phys. IV France 06 (1996) C1-407-C1-418
Transformation Plasticity and TougheningG.B. Olson
Northwestern University, Department of Materials Science and Engineering, 2225 North Campus Drive, Evanston, IL 60208-3108, U.S.A.
Analysis of the dynamic evolution of multilevel structure during martensitic transformations provides kinetics-based constitutive relations for transformation plasticity. Application in numerical modeling of ductile fracture by microvoid-softening-induced shear localization, in conjunction wilh metallographic study of crack-tip processes, identifies transformation toughening mechanisms operating on three structural length scales. Dispersed-phase transformation toughening in ultrahigh-strength martensitic steels demonstrates record levels of fracture toughness.
© EDP Sciences 1996