J. Phys. IV France 05 (1995) C8-179-C8-184
Isothermal Martensitic Transformation as an Internal-Stress-Increasing ProcessY. Liu1, Z.L. Xie2, H. Hänninen2, J. Van Humbeeck1 and J. Pietikäinen2
1 Dept. MTM, Katholieke Universiteit Leuven, de Croylaan 2, 3001 Heverlee, Belgium
2 Lab. of Engineering Materials, Helsinki University of Technology, Puumiehenkuja 3A, 02150 Espoo, Finland
Based on the results that the magnitude of the stabilization of retained austenite increases with increasing the amount of martensite transformed, it has been assumed that the martensitic transformation is accompanied with an increase in internal resisting stress which subsequently results in the stabilization of retained austenite. By simplifying this internal resisting stress to be a type of hydrostatic compressive stress acting on retained austenite due to surrounding martensite plates, a thermodynamical analysis for an isothermal martensitic transformation under applied hydrostatic pressure has been performed. The calculated results, to some extent, show a good agreement with the experimental data.
© EDP Sciences 1995