Improved laser metal deposition (LMD) of nickel base superalloys by pyrometry process control

Bernabe Carcel; Jesus Sampedro; Irene Perez; Estrella Fernandez; Jose A. Ramos

doi:10.1117/12.878749

16 November 2010 Improved laser metal deposition (LMD) of nickel base superalloys by pyrometry process control

Bernabe Carcel, Jesus Sampedro, Irene Perez, Estrella Fernandez, Jose A. Ramos

Proceedings Volume 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 775123 (2010) https://doi.org/10.1117/12.878749
Event: 18th International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2010, Sofia, Bulgaria

Abstract

Laser metal deposition (LMD) with high power lasers consists of manufacturing precise layers of materials by fusing metal powder with a laser beam over a substrate. Typical dilution of 5% allows metallurgical adhesion of the coating. This technique provides a unique combination of high accuracy and low heat affecting zone which is attractive for processing high added value components such aeroengines. Nickel (Ni) base superalloys are widely used in aeroengines because of their high mechanical properties when working at high temperatures (creep). A repairing or manufacturing chain of these components by LMD requires a good understanding of many parameters; therefore process control plays an important role. This work is focused on the study of the LMD processing of a Ni base superalloy using two colour pyrometry for the process monitoring. Presented results show how temperature and cooling rates of the LMD tracks affect the shape, microstructure and corrosion of the LMD coatings.

Citation Download Citation

Bernabe Carcel, Jesus Sampedro, Irene Perez, Estrella Fernandez, and Jose A. Ramos "Improved laser metal deposition (LMD) of nickel base superalloys by pyrometry process control", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 775123 (16 November 2010); https://doi.org/10.1117/12.878749

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