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Publications: Articles

Toutes :: 2007, 2008, 2009, 2010, ... , 2014
Tous :: A, B, C, D, E, F, G, H, I, J, K, L, M, N, P, R, S, T, V, W, X, Y, Z 
Tous :: Gautier, ... , Giovanelli, Goudeau, Gouhinec, ... , GUTIERREZ 
References par page: Mots clefs Voir les resumes


Douce, J F., Bellot, J.P., Denis, S., Chaffotte, F., Pellegrino, G., Gouhinec, F., Lamesle, P. and Maury, J.
International Journal of Microstructure and Materials Properties, 3(1):150
ISSN: 1741-8429

Equipe: Département SI2M : Microstructures et Contraintes

Bruneseaux, Fabien, Aeby-Gautier, Elisabeth, Geandier, Guillaume, Teixeira, Julien Da Costa, Appolaire, Benoit, Weisbecker, Patrick and Mauro, Anthony
ISSN: 0921-5093

Resume: The beta(BCC) -> alpha(HCP) + beta(BCC) phase transformation kinetics of the beta-metastable titanium alloy Ti17 was studied by in situ high energy X-ray diffraction (XRD) and electrical resistivity. The use of synchrotron radiation (E = 89.12 keV, lambda = 0.01402 nm) allowed to characterize specimens 6 mm in diameter, limiting thus oxidation effects. The alpha + beta -> beta phase transformation kinetics was characterized during continuous heating up to the P temperature range. The beta -> alpha + beta transformation was studied in isothermal conditions (dwell at 708 degrees C or 750 degrees C) and during continuous cooling (cooling rates of 0.05 degrees C/s, 0.1 degrees C/s and 0.61 degrees C/s). The evolutions of the phase fractions are analyzed and compared to kinetics measured by electrical resistivity, showing a good correlation between both methods. In addition, the evolutions of the cell parameters of each phase obtained from XRD patterns are analyzed in regard of the transformation kinetics. (C) 2007 Elsevier B.V. All rights reserved.

Equipe: Département SI2M : Microstructures et Contraintes

Morniroli, J. P., Houdellier, F., Roucau, C., Puiggali, J., Gesti, S. and Redjaïmia, A.
Ultramicroscopy, 108 (2)(2):100-115
ISSN: 0304-3991

Resume: By combining the large-angle convergent-beam electron diffraction (LACBED) configuration together with a microscope equipped with a C., corrector it is possible to obtain good quality spot patterns in image mode and not in diffraction mode as it is usually the case. These patterns have two main advantages with respect to the conventional selected-area electron diffraction (SAED) or microdiffraction patterns. They display a much larger number of reflections and the diffracted intensity is the integrated intensity. These patterns have strong similarities with the electron precession patterns and they can be used for various applications like the identification of the possible space groups of a crystal from observations of the Lane zones or the ab-initio structure identifications. Since this is a defocused method, another important application concerns the analysis of electron beam-sensitive materials. Successful applications to polymers are given in the present paper to prove the validity of this method with regards to these materials. (c) 2007 Elsevier B.V. All rights reserved.

Equipe: Département SI2M : Microstructures et Contraintes

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