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Publications déposées dans HAL depuis 2013

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Articles scientifiques

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Tous :: M. Hehn M. Sajieddine, ... , Melo, Menari, Mendibide, ... , Mücklich

References

Articles:
•	Jardy, Alain, Chapelle, Pierre, Malik, Ashish, Bellot, Jean-Pierre, Combeau, Herve and Dussoubs, Bernard Arc Behaviour and Cathode Melting Process during VAR: an Experimental and Numerical Study ISIJ INTERNATIONAL, 53(2):213-220 2013 ISSN: 0915-1559 DOI: 10.2355/isijinternational.53.213 Resume: The present study aims to understand the melting of the consumable electrode in the VAR process and gain some insight into the influence of an ensemble arc motion on the melting behaviour. In a previous study, a 2D axisymmetric model of the heat transfer in the cathode had been developed. Using the operating parameters as model inputs, it enabled prediction of the melt rate and the evolution of the melting area. Model results were successfully compared to melt rate measurements in an industrial VAR furnace. In recent years, it has been claimed that the electric arc may not be considered as steady and axisymmetric. Our experimental investigation of the luminosity recorded during an actual VAR heat confirms that a transient 3D behaviour may take place. Therefore, a 3D version of the previous model was set up to predict the heat transfer and melting of the electrode, using the unknown ensemble arc motion as an input. The arc is assimilated to a transient distribution of energy flux density. Results evidence that the influence of the arc motion on the shape of the electrode tip can be very important. In industrial practice, the cathode tip usually remains relatively flat during melting. The shapes of the computed electrode tips enable us to propose some arc parameters which remain compatible with both the periodic behaviour of the light emitted and the flatness of the electrode. Equipe: Centre de Compétences : ERMIONE informatique et calcul
•	Capon, F., BOILEAU, A., Carteret, C., Martin, N., Boulet, P. and Pierson, J. F. Cation size effect on the thermochromic properties of rare earth cobaltites RECoO3 (RE: La, Nd, Sm) JOURNAL OF APPLIED PHYSICS, 114 2013 ISSN: 0021-8979 DOI: 10.1063/1.4821884 Equipe: Centre de Compétences : X-Gamma rayons X et spectroscopie
•	Rougemaille, N., Montaigne, F., Canals, B., Hehn, M., Riahi, H., Lacour, D. and Toussaint, J.-C. Chiral nature of magnetic monopoles in artificial spin ice New Journal of Physics, 15 2013 http://www.scopus.com/inw...d36833edb847643b698afd109 Equipe: Département P2M : Nanomagnétisme et Electronique de Spin
•	Cortes, R., Tejeda, A., Lobo-Checa, J., Didiot, C., Kierren, B., Malterre, D., Merino, J., Flores, F., Michel, E. G. and Mascaraque, A. Competing charge ordering and Mott phases in a correlated Sn/Ge(111) two-dimensional triangular lattice PHYSICAL REVIEW B, 88(12) 2013 ISSN: 1098-0121 DOI: 10.1103/PhysRevB.88.125113 Equipe: Département P2M : Surfaces et Spectroscopies
•	Pushkareva, I., Scott, C., Goune, M., Valle, N., Redjaïmia, A. and Moulin, A Distribution of Carbon in Martensite During Quenching and Tempering of Dual Phase Steels and Consequences for Damage Properties. ISIJ International, 53:1215-1223 2013 DOI: 10.2355/isijinternational.53.1215 Equipe: Département SI2M : Microstructures et Contraintes
•	Margueron, Samuel, Bartasyte, Ausrine, Plausinaitiene, Valentina, Abrutis, Adulfas, Boulet, Pascal, Kubilius, Virgaudas and Saltyte, Zita Effect of deposition conditions on the stoichiometry and structural properties of LiNbO3 thin films deposited by MOCVD 8626 2013 ISSN: 0277-786X DOI: 10.1117/12.2010105 Equipe: Centre de Compétences : X-Gamma rayons X et spectroscopie
•	Vasseur, Guillaume, Fagot-Revurat, Yannick, Kierren, Bertrand, Sicot, Muriel and Malterre, Daniel Effect of Symmetry Breaking on Electronic Band Structure: Gap Opening at the High Symmetry Points SYMMETRY-BASEL, 5(4):344-354 2013 ISSN: 2073-8994 DOI: 10.3390/sym5040344 Equipe: Département P2M : Surfaces et Spectroscopies
•	Martin, J., Melhem, A., Shchedrina, I., Duchanoy, T., Nominé, A., Henrion, G., Czerwiec, T. and Belmonte, T. Effects of electrical parameters on the plasma electrolytic oxidation of aluminium Surface and Coatings Technology, 221:70 2013 DOI: http://dx.doi.org/10.1016/j.surfcoat.2013.01.029 Resume: The plasma electrolytic oxidation (PEO) of aluminium alloys is investigated for different electrical working conditions using a pulsed bipolar current supply. A particular attention is paid to the effect of the anodic current density (from 10 to 90 A dm-2) and current pulse frequency (from 100 to 900 Hz) on the resulting oxide layer. Micro-discharges are characterized during the process by means of fast video imaging with a time and a space resolution of 8 Î¼s and 0.017 mm2, respectively. Correlations are established between themicro-discharge characteristics (surface density, lifetime and size) and the elaborated oxide layers (morphology, growth rate and surface roughness). The highest coating growth rate measured (2.1 Î¼m min-1) is achieved with the combination of the highest current density (75.7 A dm-2) and the highest current pulse frequency (900 Hz). Within these specific current conditions it is concluded that the detrimental effects of numerous micro-discharges are minimized. The results also show that the surface roughness may be largely affected by the presence of long-lived and large micro-discharges which develop over the processed surface. The strongest micro-discharges (live duration up to 0.3 ms and cross-sectional area up to 1 mm2) are mainly observed with the combination of the highest current density (75.7 A dm-2) and the lowest current pulse frequency (100 Hz). Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS
•	Tournier-Colletta, C., Kierren, B., Fagot-Revurat, Y. and Malterre, D. Electron hopping at the Si(111):B-root 3 surface: Insight from local impurity spectroscopy PHYSICAL REVIEW B, 87(7) 2013 ISSN: 1098-0121 DOI: 10.1103/PhysRevB.87.075427 Equipe: Département P2M : Surfaces et Spectroscopies
•	Riahi, H., Montaigne, F., Rougemaille, N., Canals, B., Lacour, D. and Hehn, M. Energy levels of interacting curved nanomagnets in a frustrated geometry: Increasing accuracy when using finite difference methods Journal of Physics Condensed Matter, 25(29) 2013 http://www.scopus.com/inw...b32fe24df35ebe11a5e02b47d Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

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