Laser processing and microstructure of Al-Cu-Fe quasicrystalline coatings on Al-base materials
نویسندگان
چکیده
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 AlisFe4t -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.
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