Submit Manuscript | http://medcraveonline.com Introduction Laser surface remelting (LSR) has attracted increasing interest in recent years owing to its special capabilities. High energy density of LSR translates into effcient use of energy for remelting, because LSR modifes surface properties of a material without affecting its bulk properties. LSR results in rapid quenching of the molten material by conduction into the cold subsurface after rapid irradiation. This type of behavior was also observed, 1 who applied laser surface melting (LSM) technique in a study of high strength aluminum alloys (HSAL). LSR technique was for a study of hypoeutectic Al-1.5 wt. % Fe alloy. Characterization of the cast region revealed the formation of a refned, dense and highly homogeneous microstructure, as well as cracking, noticeably with a high formation of protuberance on the weld fllets than alloy untreate. 2,3 An overlapping line of consecutive weld fllets was also perceptible in the cast region of this alloy, which resulted in an increase of about 61% in hardness compared to the base material. The Marangoni effect 4 infuence thermal gradient in the molten pool a high temperature, meanwhile, also it produces effects in quality and properties of microstructure, morphological characteristic and as well as quality of laser-treated workpiece track. Yet these same authors confrmed, at low laser beam velocities, the morphology is higher and quality of track presents many defects than at high laser beam velocities. Moreover, laser shock peening (LSP) process enables the improvement of corrosion resistance by means of increased pitting potential with lower intensity of pitting attack on the specimen’s surface. 5 Was confrmed higher corrosion resistance of laser-peened friction stir-welded 7075 aluminum joints in a 3.5% NaCl solution. 6 Although, during LSR-treatment in Al alloy, the melted zone was constituted of metastable phases by LAXRD analysis and it revealed the presence mainly of Al 2 O 3 and AlN phases. 2,7 These authors emphasized, which these phases contributed in the microstructural modifcation, favored the characteristics of high hardness and corrosion resistance of LSR-treated work piece in sulfuric acid. This study involved LSR treatment of hypereutectic Al-2.0 wt. % Fe alloy. The sample was characterized by various techniques, including optical microscopy (OM), scanning electron microscopy (SEM), vickers micro hardness test. Analysis of Vickers hardness were done in the cross-sectional area of treated sample and on the treated sample surface. Furthermore, the electrochemical impedance spectroscopy (EIS) test was studied and their numerical simulation was done. The microstructure microhardness and electrochemical behavior of laser-treated layer were systematically investigated to correlate their properties with process involved. Materials and methods Material Hypereutectic Al-2.0 wt. % Fe alloy under study was prepared with commercially pure raw materials. The material was cast in a resistance furnace (muffe) by pouring the liquid metal into a cylindrical ingot mold and cooling in ascending mode. Resulting ingot was sectioned into various samples, which were sand blasted individually to determine the chemical composition of alloy by energy-dispersive X-ray fuorescence spectrometry (Shimadzu EDX-7000), as indicated in Table 1. Adv Tissue Eng Regen Med Open Access. 2018;4(4):103‒110. 103 © 2018 Pariona et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and build upon your work non-commercially. Al-Fe alloy processed by laser surface remelting and your infuence on microstructure, microhardness and electrochemical behavior Volume 4 Issue 4 - 2018 Moises Meza Pariona, Katieli Tives Micene, Alfredo José Zara State University of Ponta Grossa, Brazil Correspondence: Moises Meza Pariona, University State University of Ponta Grossa, Campus Uvaranas - Av. General Carlos Cavalcanti, 4748 - CEP 84030-900, Brazil, Tel 55-42- 32203056, Email Received: August 07, 2018 | Published: November 16, 2018 Abstract An analysis was made of microstructure of hypereutectic Al-2.0 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 11 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. Keywords: laser surface remelting, Al-2.0 wt.% Fe, microstructure, microhardness, OM, FESEM, electrochemical behavior Advances in Tissue Engineering and Regenerative Medicine Research Article Open Access