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Influence of temperature on stress distribution in bainitic steels -Application to 16MND5-A508 pressure vessel steel

Article dans une revue avec comité de lecture
Author
OUAHAB, Razane
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
PESCI, Raphaël
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
BERVEILLER, Sophie
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
PATOOR, Etienne
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]

URI
http://hdl.handle.net/10985/10325
DOI
10.4028/www.scientific.net/MSF.681.243
Date
2011
Journal
Materials Science Forum

Abstract

In this study, the internal stress evolution of the ferrite phase of 16MND5-A508 has been determined using X-Ray Diffraction (XRD). The results of in situ tests combined with XRD analyses and performed at different temperatures (-150°C and 22°C) exhibit a difference of about 200MPa between the macroscopic stress and the ferrite one. The stress state in the cementite is determined by a mixture law; it reaches very high values up to 9000MPa. These results highlight the need to analyze the stress directly in the cementite phase by using appropriate tools, since its volume fraction does not allow it using XRD.

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