Publications: Articles
Articles: | |
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Journal of Thermal Analysis and Calorimetry,
104(2):627-633
2010
ISSN: 1572-8943
Equipe: Département SI2M : Microstructures et Contraintes |
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International Journal of Microstructure and Materials Properties,,
5 (1):65-78
2010
Equipe: Département SI2M : Microstructures et Contraintes |
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Scripta Materialia,
63 (12)(12):1232-1235
2010
ISSN: 1359-6462
Resume: In situ transmission electron microscopy investigations were carried out on a supersaturated nitrogen ferrite to characterise the precipitation kinetics of alpha `'-Fe16N2 nitrides at 85 degrees C. The coarsening behaviour consists of two stages. The first stage obeys the LSW theory and the coarsening rate was determined as 11.2 nm(3) s(-1). The second stage corresponds to the stabilization of coarsening, and was assumed to be related to the coherency loss between the precipitates and the matrix. (c) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. Equipe: Département SI2M : Microstructures et Contraintes |
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Nuclear Engineering and Design,
240:1975-1985
2010
Equipe: Département SI2M : Microstructures et Contraintes |
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Philisophical magazine,
90(1-4):461-483
2010
ISSN: 1478-6435
Resume: We propose a description of incoherent and semi-coherent interfaces within the framework of diffuse interface modelling: accounting for the discontinuity of tangential displacements is an issue addressed by introducing a new field, called the incoherency field, located in the diffuse interface and able to release the shear stresses tangential to the interface. After having demonstrated the ability of the model to recover trends obtained by sharp interface models of sliding interfaces, the process of loss of coherency is investigated by assuming a local process which would result from the competition between the shear stress release at the interface and the interfacial energy increase. Equipe: Département SI2M : Microstructures et Contraintes |
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Materials Characterization,
6 (11)(11):1245-1251
2010
ISSN: 1044-5803
Resume: Acicular shaped crystals precipitate from gamma Fe4N nitride in an iron-nitrogen alloy and were identified by electron microdiffraction as alpha ferrite Acicular ferrite develops both the Nishiyama-Wassermann and the Kurdjumov-Sachs orientation relationships with gamma' Fe4N nitride These orientation relationships were discussed in terms of the symmetry theory The driving force for acicular ferrite formation was related to the increasing nitrogen content of gamma' Fe4N, in equilibrium with alpha ferrite, with decreasing temperature The passage from lamellar to acicular structure in Fe-N system was proposed (C) 2010 Elsevier Inc All rights reserved Equipe: Département SI2M : Microstructures et Contraintes |