Surface alloying of nickel based superalloys by laser
DOI:
https://doi.org/10.3989/revmetalm.1998.v34.i2.684Keywords:
Laser treatments, Oxidation, SuperalloysAbstract
Ni based superalloys present a high oxidation resistance at high temperature as well as good mechanical properties. But new tecnhology developments forcé to research in this materials to improve their properties at high temperature. In this work, two Ni based superalloys (Nimonic 80A and Inconel 600) were surface alloyed with aluminium using a high power laser. SEM and EDX were used to study the microstructure of the obtained coatings. Alloyed specimens were tested at 1.273 K between 24 and 250 h. Results showed the generation of a protective and continuous coating of alumina on the laser treated specimens surface that can improve oxidation resistance.
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