|About this Abstract
||2010 TMS Annual Meeting & Exhibition
||Processing Materials for Properties
||Damage of Surface by Impact of Nitrogen Jet under Pressure and Low Temperature
||Hicham Laribou, Claude FRESSENGEAS, Denis ENTEMEYER, Véronique JEANCLAUDE, Abdel TAZIBT
|On-Site Speaker (Planned)
Processing surfaces with nitrogen jet at low temperature is an environmentally friendly and innovating technology. It has been introduced by NITROCISION for industrial applications since 2003. The process consists in projecting onto the surface a nitrogen jet at 3000bars and -150°C. Several effects are combined. Reducing the temperature fragilizes the material, the thermal shock induces traction waves through the material, depressurization of the cryogenic fluid during vaporization induces a blasting effect promoting plastic deformation or lifting the material from the substrate, cavitation of gas inclusions in droplets induces high impact pressures.The process does not generate additional waste and it releases neutral gas into the atmosphere. It can be used in a range of industrial applications, including surface treatment, cutting, drilling, striping and cleaning. This work aims at understanding the mechanisms of surface removal as well as the modes of action of the jet on metallic materials.
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