CHANGEMENTS DE PHASES ET MICROSTRUCTURES
J. Phys. IV France 04 (1994) C3-123-C3-126
Mechanism of austenitic transformation in the martensitic stainless steel of type PH 15-5H.R. HABIBI BAJGUIRANI
ISMA, Université de Paris-Sud, Laboratoire de Métallurgie Structurale, UA 1107 du CNRS, Bât. 413, 91405 Orsay, France
By dilatometric analysis and TEM experiments, the martensite (M)→austenite γ transformation and the formation of the precipitates in PH 15-5 alloy were studied between 20 and 1050°C, using heating rate (Rh) , and cooling rate (Rc) = 300°C.h-1. For this heating rate the M→γ transformation develops in two steps. Detailed analysis of the diffusion processes controlling the two stages of the austenite transformation, was carried out, using cumulated thermal cycles between 600 and 1050°C.
© EDP Sciences 1994