Al-Fe alloy processed by laser surface remelting and your influence on microstructure, microhardness and electrochemical behavior

An analysis was made of microstructure of hypereutectic Al wt Fe alloy treated by laser surface remelting LSR microhardness test and electrochemical behavior test and their numerical simulation was done Microstructure was analyzed by optical microscopy field emission scanning electron microscopy and Vickers microhardness tests Results obtained in this study indicate in LSR treatment occurred rapid heating and followed by rapid cooling resulting in formation of a thin recast layer with a refined microstructure with dissolution of precipitates and inclusions and formation of metastable phases however an overlapping line on consecutive weld fillets was observed Furthermore analysis of Vickers hardness were done in the cross sectional area of treated sample and on the treated sample surface therefore result a greater microhardness of the treated region than untreated substrate Through the electrochemical impedance spectroscopy EIS test laser surface remelting treated workpiece exhibit higher polarization resistance than untreated at times higher and capacitive behavior of material is related to aluminum oxide layer properties then microstructure characteristic caused by overlapping ratio and multi track has a strong effect on electrochemical process This material can be applied in the aerospace autmovolist and implant materials used in medicine