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Abstract : The wear properties of aluminium base alloys are relatively poor. Laser surface melting and alloying has proved successful in many alloy systems as a means of significantly improving the surface properties. The present work describes experiments designed to establish the scope of laser treatment of aluminium alloys. Aluminium does not absorb CO2 laser light as well as other metals which necessitated first a general study of absorption caotings. Aluminium alloys offer fewer opportunities than steels where the martensitic transformation can be employed. The possibilities are surface melting of systems where intermetallic phases form producing a refinement of the structure or surface alloying using a suitable coating to produce a fine distribution of a hard second phase. Results are presented on surface melting of aluminium-nickel alloys and surface alloying with nickel.





Autor: S. Veit D. Albert R. Mergen

Fuente: https://hal.archives-ouvertes.fr/



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