Numéro
J. Phys. IV France
Volume 04, Numéro C3, Février 1994
36ème Colloque de Métallurgie de l'INSTN
CHANGEMENTS DE PHASES ET MICROSTRUCTURES
Page(s) C3-123 - C3-126
DOI http://dx.doi.org/10.1051/jp4:1994317
36ème Colloque de Métallurgie de l'INSTN
CHANGEMENTS DE PHASES ET MICROSTRUCTURES

J. Phys. IV France 04 (1994) C3-123-C3-126

DOI: 10.1051/jp4:1994317

Mechanism of austenitic transformation in the martensitic stainless steel of type PH 15-5

H.R. HABIBI BAJGUIRANI

ISMA, Université de Paris-Sud, Laboratoire de Métallurgie Structurale, UA 1107 du CNRS, Bât. 413, 91405 Orsay, France


Abstract
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