Surface oxidation of nickel base alloys and stainless steel under pure oxygen atmosphere: Application to oxygen safety
Type
Articles dans des revues avec comité de lectureArticles dans des revues avec comité de lecture
Author
Date
2019Journal
Journal of Laser ApplicationsAbstract
Irradiation by a high power laser beam has been used since several years as an innovative approach for evaluating the reactivity of metallic materials with a pure oxygen atmosphere. Indeed, materials selection for oxygen service is a key factor of mitigating the ignition of equipment also called as oxygen fire. Pulled by the need having always more efficient industrial processes, the oxygen usages are evolving toward steadily higher pressures or temperatures. In such operating conditions, the evaluation of the metallic materials resistance to the oxygen fire ignition and their property to propagate based on the oxidation kinetic is the only way to avoid the oversizing of equipment. In this context, the use of laser in evaluating the reactivity of metallic materials is a well-adapted method enabling the accurate control of the energy deposition transmitted to the tested material during oxidation as well as giving access to the energy threshold required to trigger the oxygen fire ignition. This paper investigates the oxidation kinetics on nickel-based alloys (Inconels 600 and 625) and on stainless steel 310, using a laser or a furnace preheating on small metallic parts. The scope of the study is the oxidation step taking place before the heating of the sample up to its ignition temperature. Process parameters are oxygen pressure (1 and 40 barg), oxygen content (air versus pure oxygen), duration, and temperature. A numerical model is used to couple a sample surface condition (machined, sandblasted, polished) with laser parameters (power, duration) needed to reach a predetermined preheating temperature of the sample. In order to determine the threshold heat input for materials' ignition by a laser in the oxygen atmosphere, it is necessary to know the absorption coefficient of the laser at the sample surface. This parameter is measured for various oxide layer thicknesses.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
MARTIN, Patrick; MARSOT, Jacques; DAILLE-LEFEVRE, Bruno; GODOT, Xavier; ABBA, Gabriel; SIADAT, Ali; GOMEZ-ECHEVERRI, Juan-Camilo (Springer, 2019)Human in the factory is one of the main themes of the Factory of the Future, in this context the aim of this paper is to present the new issues for workers safety and the in-tegrated design concepts or methodologies which ...
-
LE GUEN, Emilie; FABBRO, Rémy; CARIN, Muriel; COSTE, Frédéric; LE MASSON, Philippe (Elsevier, 2011)In the hybrid laser-arc welding process, a laser beam and an electric arc are coupled in order to combine the advantages of both processes: high welding speed, low thermal load and high depth penetration thanks to the ...
-
LE GUEN, Emilie; CARIN, Muriel; FABBRO, Rémy; COSTE, Frédéric; LE MASSON, Philippe (Elsevier, 2011)A three-dimensional heat transfer model was developed to predict the temperature fields, the weld geometry and the shape of the solidified weld reinforcement surface during hybrid laser-MAG arc welding of fillet joints. ...
-
COSTES, Jean-Philippe; EVRARD, Arnaud; BIOT, Benjamin; KEUTGEN, Gauthier; DARAS, Amaury; DUBOIS, Samuel; LEBEAU, Frédéric; COURARD, Luc (MDPI, 2017)The thermal conductivity of straw bales is an intensively discussed topic in the international straw bale community. Straw bales are, by nature, highly heterogeneous and porous. They can have a relatively large range of ...
-
GUNENTHIRAM, Valérie; PEYRE, Patrice; SCHNEIDER, Matthieu; DAL, Morgan; COSTE, Frédéric; FABBRO, Rémy (Laser Institute of America, 2017)The laser powder bed fusion (LPBF) or powder-bed additive layer manufacturing process is now recognized as a high-potential manufacturing process for complex metallic parts. However, many technical issues are still to ...