J. Phys. IV France 04 (1994) C4-155-C4-158
Laser processing and microstructure of Al-Cu-Fe quasicrystalline coatings on Al-base materialsP. SALLAMAND and J.M. PELLETIER
GEMPPM-CALFETMAT, Bât. 403, INSA, 69621 Villeurbanne cedex, France
There is a large interest in using high power lasers for surface alloying or cladding on aluminium alloys, in order to enhance hardness and to improve wear resistance. A partly quasicrystalline surface layer (QC) (Al-Cu-Fe coating) has been obtained by laser cladding on Al-base materials. In addition to crystalline phases (Al5Fe2 and Al13Fe4, with dissolved copper), a quasicrystalline Al-Cu-Fe phase is detected. However, crystallization of this quasicrystalline phase occurs during isothermal heat treatment at 525°C. A mechanism is proposed for the solidification process resulting from laser cladding.
© EDP Sciences 1994