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Real Time Modeling and Control in Plasma Arc Fabrication of Intermetallic Coatings | IEEE Conference Publication | IEEE Xplore

Real Time Modeling and Control in Plasma Arc Fabrication of Intermetallic Coatings


Abstract:

Successful fabrication of intermetallic coatings on surfaces of manufacturing interest involves regulation of the temperature/ concentration dynamic distributions that de...Show More

Abstract:

Successful fabrication of intermetallic coatings on surfaces of manufacturing interest involves regulation of the temperature/ concentration dynamic distributions that develop in the molten layer during the thermal and reaction process. Modeling the spatio-temporal dynamics of this metallurgical process, however, requires partial differential equations that are cumbersome to solve on-line, as part of a real time reference model to the controller. To this end, we present a computationally parallel and meshless model to decipher the dynamics of the thermal coating process and to permit real time monitoring and control of the resulting coating microstructure. The analytical model, which is solved numerically using Matlab, is validated with nickel aluminide coatings processed on a robotic plasma arc laboratory station, through in-process infrared thermal sensing and off-line metallographic analysis. A proportional-integral control scheme, that involves on-line parameter identification and model adaptation, is also developed to facilitate the successful production of binary metal system coatings that exhibit the desired microstructure geometry and characteristics.
Date of Conference: 15-15 December 2005
Date Added to IEEE Xplore: 30 January 2006
Print ISBN:0-7803-9567-0
Print ISSN: 0191-2216
Conference Location: Seville, Spain

References

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