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

H.R. HABIBI BAJGUIRANI

doi:doi:10.1051/jp4:1994317

Numéro		J. Phys. IV France Volume 04, Numéro C3, Février 1994 36^ème Colloque de Métallurgie de l'INSTN CHANGEMENTS DE PHASES ET MICROSTRUCTURES


Page(s)		C3-123 - C3-126
DOI		https://doi.org/10.1051/jp4:1994317

36^ème 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 (R_h) , and cooling rate (R_c) = 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.