Corrosion behavior of Al-Fe alloy metastable phases produced by laser surface remelting technic

Abstract

Laser surface remelting LSR treatment was performed to Al ndash wt Fe alloy with a kW Yb fiber laser IPG YLR S Characterization of substrate and laser treated material were executed using different techniques i e microstructure was analyzed by optical microscope SEM low angle X ray diffraction LAXRD and corrosion test was made in aerated solution of mol L of H SO at deg C As result was shown micrograph of LSR treated material it displaying a fine cellular structure as well as existence of certain nano porosities and similar a nano dendritic growth was observed too Characteristic of melted zone was constituted of metastable phases according to x rays result and corrosion behavior as a result of LSR treated sample which it was shown to be more resistant to corrosion than untreated sample A comparative study was carried out of cyclic polarization of the laser treated and untreated samples demonstrating that LSR treated sample propitious the passivity on the surface and so reduced the corrosion phenomena wherefore this type of laser treated alloy can be applied in the aerospace aeronautic automobilist industries and implant material in humans