J. Phys. IV France 05 (1995) C8-279-C8-284
A Balance Principle Approach for Modeling Phase Transformation KineticsM. Lusk1, G. Krauss2 and H.-J. Jou1
1 Division of Engineering, Colorado School of Mines, Golden, CO 80401, U.S.A.
2 Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO 80401, U.S.A.
A balance principle is offered to model volume fraction kinetics of phase transformation kinetics at a continuum level. This microbalance provides a differential equation for transformation kinetics which is coupled to the differential equations governing the mechanical and thermal aspects of the process. Application here is restricted to diffusive transformations for the sake of clarity, although the principle is discussed for martensitic phase transitions as well. Avrami-type kinetics are shown to result from a special class of energy functions. An illustrative example using a 0.5% C Chromium steel demonstrates how TTT and CCT curves can be generated using a particularly simple effective energy function.
© EDP Sciences 1995