C. Gorny

Institut de France

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i-10 index

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Co-Authors

Patrice Peyre

Centre National de la Recherche Scientifique

Tony Montésin

Université de Bourgogne

Armand Kanjer

Laboratoire Interdisciplinaire Carnot de Bourgogne

Virgil Optasanu

Université de Bourgogne

M.C. Marco de Lucas

Université de Bourgogne

L. Lavisse

Université de Bourgogne

Pascal Berger

Centre National de la Recherche Scientifique

O. Castelnau

Laboratoire Procédés et Ingénierie en Mécanique et Matériaux

Laurent Berthe

Centre National de la Recherche Scientifique

Sébastien Pouzet

Centre National de la Recherche Scientifique

Cooperative Institutions

Centre National de la Recherche Scientifique

École nationale supérieure d'arts et métiers

ParisTech

Laboratoire Procédés et Ingénierie en Mécanique et Matériaux

Conservatoire National des Arts et Métiers

HESAM Université

Assistance Publique – Hôpitaux de Paris

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Sorbonne Université

Université de Bourgogne

Author Statistics

Papers

Citation

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Évaluation in vitro des taux d’ablation avec Ho:YAG et TFL : influence de l’homogénéité de l’échantillon

Progrès en Urologie - FMC (2022)

F. Panthier Thibault Germain C. Gorny Laurent Berthe Steeve Doizi

10.1016/j.fpurol.2022.07.012

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Citations (0)

Comparaison des lasers Holmium:YAG et Thulium fibré sur le risque de fracture des fibres laser et étude des facteurs impliqués dans leur dégradation

Progrès en Urologie (2021)

Thibault Germain Audrey Uzan F. Panthier P. Chiron C. Gorny

10.1016/j.purol.2021.08.191

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Analysis of a Ni-Fe-Cr-Mo-Si hardfacing alloy manufactured by laser cladding: influence of the iron content on the wear resistance properties

Procedia CIRP (2018)

Pascal Aubry Christine Blanc I. Demirci C. Gorny Hicham Maskrot

In this article, we present an ongoing study on a Ni-Fe-Cr-Mo-Si based alloy, as one of the potential cobalt free hardfacing materials. Here, we analyze the effect of the variation of iron content on microstructure and wear property that is induced by a controlled dilution the 316L substrate, or by direct addition. First, we present the state of the art on the proposed Ni-Cr-Mo-Si based alloy. Then, the laser cladding setup is presented and the process parameter map search of the Ni-Fe-Cr-Mo-Si based alloy too. Then, iron is added to the base Ni-Cr-Mo-Si alloy by direct fusion of the powders coming from two different powder feeders and directly blended into the coaxial nozzle used. Finally the samples are analyzed in iron content, microhardness and microstructure. The tribology tests of the samples exhibit a clear change in wear behavior with the iron content and an improvement at a certain level of iron.

Hardfacing

Cladding (metalworking)

Stellite

10.1016/j.procir.2018.08.096

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Citations (10)

Tracking the role of nitrogen in the improvement of the high temperature oxidation resistance of titanium by mechanical treatments

Corrosion Science (2022)

L. Lavisse Pascal Berger Armand Kanjer Virgil Optasanu C. Gorny

Embrittlement

10.1016/j.corsci.2021.110080

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Citations (21)

Effect of mechanical surface treatments on the high temperature oxidation of pure titanium: the role of nitrogen

MATEC Web of Conferences (2020)

L. Lavisse Armand Kanjer Pascal Berger Patrice Peyre C. Gorny

The mechanically treated high temperature (700°C) oxidation of commercially pure titanium was studied for long exposures (3000 h). The treatments studied here are the shot-peening and the laser-shock peening. The mass gain was measured by discontinued weighing. SEM and Raman imaging revealed strong differences between laser-shock peened, shot-peened and untreated oxidized samples. The laser treatment leads to thin compact and protective oxide layer while the shot-peened and untreated samples exhibit cracked oxide layers. The distribution of light elements like carbon, oxygen and nitrogen was revealed by Ion Beam Analysis. The presence of nitrogen located at the interface between the oxide scale and the metal was revealed on laser-shock peened samples. It is supposed the nitrogen slows-down the oxygen diffusion into the metal. The extent of the oxygen-enriched metal is also smaller on LSP samples, which improves the ductility of titanium.

Titanium oxide

10.1051/matecconf/202032112045

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Citations (1)

Development of new duplex treatments on 100Cr6steel combining Thermochemical Treatments, Laser Shock Peening and Physical Vapour Deposition

Journal of Physics Conference Series (2017)

Javier Osés G.G. Fuentes Sirpa Domingo Ivancy M Miguel S. Gimeno

100Cr6 steel (AISI 52100) is one of the most used steel grades in the manufacturing of through hardening bearings mainly due to its properties: controlled impurities during steel making process, high hardenability and well known mechanical properties such as wear and fatigue resistance on clean environments. These characteristics play an important role on the performance of a bearing together with the bearing design, loads and environment. However, there is an increasing set of demanding applications where the above mentioned steel does not fulfil the required needs and thus, bearing manufacturers continuously work on the development of technologies to improve the bearing performance.

Hardenability

Duplex (building)

Hardening (computing)

Load bearing

Case hardening

10.1088/1742-6596/843/1/012080

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Citations (1)

Direct metal deposition of titanium matrix composites using B4C powder

Sébastien Pouzet Patrice Peyre C. Gorny O. Castelnau Thierry Baudin

Titanium Matrix Composites (TMC's) containing various volume fractions of (TiB+TiC) particles were obtained by the direct metal deposition (DMD) of blends of (Ti-6Al-4V+B4C) projected powders, through the in-situ chemical reaction 5 Ti + B4C→4 TiB+TiC. Process optimization in terms of laser power and scanning speed allowed obtaining homogeneously distributed TiB whiskers within Titanium matrix, a full solubilisation of C for low B4C contents (0.5 wt. % and 1.5 wt. %), and the formation of a small amount of globular TiC particles at higher B4C content (3 %). Comparisons with Ti-6Al-4V DMD walls revealed a severe grain refinement on TMC's due to enhanced grain germinations on TiB whiskers, even for low B4C contents. Last, mechanical investigations indicated 10 to 15 % increases of Vickers hardness, and a constant 10 % increase of young's modulus on a large temperature range (20-600°C) whatever the B4C content.

Matrix (chemical analysis)

Deposition

10.2351/1.5063239

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Epidemiological Data, Functional Outcome, and Quality of Life of Patients with Multiple Amputations Due to Septic Shock

C. Gorny Anton Kaniewski Brice Lavrard

1. Background Septic shock is a rare and serious infectious disease. Patients surviving the early phase are at high risk of multiple amputations of limbs. They are potential sources of serious disability. 2. Methods The objective was to describe the functional prognosis and quality of life of the four-limb amputee patients following septic shock. This is a descriptive, retrospective and mono-centric study. The patients included between 2010 and 2019 had septic shock after 18 years, responsible for amputation of the four limbs. We studied the mean age of septic shock, the causative organisms, the infectious door enter, the different levels of amputation, the fitting process, the resumption of walking, the Functional Independence Measure (FIM) and the SF-12 Quality of Life Questionnaire. 3. Results We suceed to include 15 patients.. 53.3% women and 46.7% men with an average age of 46.1 years. 80% presented bilateral trans-tibial amputations, all were able to return walking even over short distances, within an average of 8.4 months. 40% did not require a technical walking aid, 33.3% had no walking perimeter limitation. 47% had a higher mental and social quality of life score than the general population. The younger the patients, the better their physical quality of life. After two years of follow-up, the younger the patients, the better their functional autonomy. Patients with better functional autonomy had a better physical quality of life. 4. Conclusion The number of amputations due to spetic shock is likely to increase in the years to come throughout the world. Our study prove that quadri-amputee patient can regain a fully acceptable functional and quality of life being monitored in a specialized health center with multidisciplinary health professional to help him.

10.20944/preprints202312.1452.v1

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Citations (1)

Study of laser interaction in water flow confinement at high repetition rate

Journal of Laser Applications (2017)

Laurent Berthe Damien Courapied S. El karnighi Patrice Peyre C. Gorny

This paper presents a study on the confined interaction with water flow for two successive laser pulses. The dynamic of the renewal of water films after shock produced by the laser is observed using a high speed camera. Pressure produced by the two pulses is measured from rear free surface velocity measurements using a velocimeter interferometry system for any reflector. The results show a threshold delay between the two laser pulses for which laser/target coupling of the second pulse decreases. This depends on the spot diameter, the laser intensity, and flow rate. This threshold can be calculated from the maximum jet diameter and flow rate. At an incident power density of 3 GW/cm2, a spot diameter of 1 mm, and a flow rate of 10 m/s, the maximum repetition rate ensuring target/coupling of successive laser pulses can be 1 kHz. The results open perspective for laser shock peening at high repetition rates.

10.2351/1.5007947

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Citations (6)

Absorptivity measurements during laser powder bed fusion of pure copper with a 1 kW cw green laser

Optics & Laser Technology (2021)

Guillaume Nordet C. Gorny Yaasin Mayi Julien Daligault Morgan Dal

Molar absorptivity

Keyhole

Penetration (warfare)

Integrating sphere

10.1016/j.optlastec.2021.107612

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Citations (21)