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2014

Articles:

Djaziri, S., Renault, P.-O., Le Bourhis, E., Goudeau, Ph., Faurie, D., Geandier, G., Mocuta, C. and Thiaudière, D.
Journal of Applied Physics, 116:093504
2014

Equipe: Département SI2M : Microstructures et Contraintes

Geandier, G., Dehmas, M., Mourot, M., Aeby-Gautier, E., Denis, S., Martin, O. and Karnatak, N.
Journal of heat treatments and materials, 69:54--59
2014

Equipe: Département SI2M : Microstructures et Contraintes

Chambrier, M-H, Le Bail, A., Giovanelli, F., Redjaïmia, A, Florian, P., Massiot, D., Suard, E. and Goutenoire, F.
Inorganic Chemistry, 53 (1):147-159
2014

Equipe: Département SI2M : Microstructures et Contraintes

Grosseau-Poussard, Jean Luc, Guerain, Mathieu, Goudeau, Philippe, Geandier, Guillaume, Panicaud, Benoit, Tamura, Nobumichi, Kunz, Martin, Dejoie, Catherine and Micha, Jean Sebastien
Advances in Science and Technology, 91:100???107
2014
ISSN: 1662-0356

Equipe: Département SI2M : Microstructures et Contraintes

2013

Articles:

Pushkareva, I., Scott, C., Goune, M., Valle, N., Redjaïmia, A. and Moulin, A
ISIJ International, 53:1215-1223
2013

Equipe: Département SI2M : Microstructures et Contraintes

Geandier, G., Dehmas, M., Mourot, M., Aeby-Gautier, E., Denis, S., Martin, O. and Karnatak, N.
Materials Science Forum, 768-769:313-320
2013

Equipe: Département SI2M : Microstructures et Contraintes

Devynck, S., Gradeck, M., Bellot, J.P., Denis, S., Maigrat, G., Varlez, M. and Benard, T.
Key Engineering Materials, 554--557:1530--1538
2013

Equipe: Département SI2M : Microstructures et Contraintes

2012

Articles:

Horwat, D., JIMENEZ-PIQUE, E., Pierson, J. F., Migot, S., Dehmas, M. and Anglada, M.
Journal of Physics and Chemistry of solids, 73(4):554-558
2012
ISSN: 0022-3697

Resume: Zr1-xWx nanocrystalline films of Zr-W solid solutions and ZrW2 Laves phase were synthesized by magnetron co-sputtering. Large values of the H/E ratio up to 0.09 are observed for grain sizes in the nanometer range along with a hardness above 10 GPa and Young's modulus below 230 GPa. H/E values are correlated with the developed surface of grain boundaries suggesting an elastic deformation mostly handled by the grain boundaries. This is associated to friction coefficients comparable to those of metallic glass surfaces. In contrast to fragile bulk Laves phases, no cracks were detected at the film surface after indentation and scratch test of nanocrystalline ZrW2. The friction coefficient of such films against diamond tip was in the range 0.08-0.15, similarly to metallic glass surfaces. (C) 2011 Elsevier Ltd. All rights reserved.

Equipe: Département SI2M : Microstructures et Contraintes

Dehmas, Moukrane, Salib, Matthieu, Geandier, Guillaume, Gautier, Elisabeth, Karnatak, Nikhil and Martin, Olivier
Matériaux et techniques, 100:103-105
2012

Equipe: Département SI2M : Microstructures et Contraintes

2011

Articles:

Pushkareva, Irina, Redjaimia, Abdelkrim, Moulin, Antoine and Valle, Nathalie
Solid State Phenomena, 172-174(Part 1):839-844
2011
ISSN: 1012-0394

Resume: A detailed analysis of the evolution of industrial Dual Phase (DP) steel microstructures is carried out as a function of various annealing and tempering conditions. Advanced characterization techniques such as Parallel Electron Energy Loss Spectroscopy (PEELS) in the TEM and high spatial resolution Secondary Ion Mass Spectrometry (NanoSIMS) are employed in order to provide qualitative and quantitative measurements of local carbon concentration in the martensite. For certain annealing and tempering conditions, it is observed that local variations in carbon levels have occurred inside the individual martensite islands. These carbon variations strongly influence the damage behaviour of the steel. During tensile tests, a clear dependence of the damage mode on the local martensite carbon content is observed. Better knowledge of the relationship between the microstructure evolution at the sub-grain level and the damage behaviour can facilitate the design of DP steels with improved damage resistance.

Equipe: Département SI2M : Microstructures et Contraintes

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