AFM study of the effects of laser surface remelting on the morphology of Al–Fe aerospace alloys

Laser beam welding has recently been incorporated into the fabrication process of aircraft and automobile structures. Surface roughness is an important parameter of product quality that strongly affects the performance of mechanical parts, as well as production costs. This parameter influences the m...

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Bibliographic Details
Published in:	Materials characterization Vol. 74; no. Complete; pp. 64 - 76
Main Authors:	Pariona, Moisés Meza, Teleginski, Viviane, Santos, Kelly dos, dos Santos, Everton Leandro Ribeiro, de Lima, Angela Aparecida de Oliveira Camargo, Riva, Rudimar
Format:	Journal Article
Language:	English
Published:	New York, NY Elsevier Inc 01-12-2012 Elsevier
Subjects:	Aircraft components ALLOYS ALUMINIUM OXIDES Aluminum base alloys Al–Fe alloys Applied sciences ATOMIC FORCE MICROSCOPY CORROSION Corrosion environments CORROSION RESISTANCE CREEP Cross-disciplinary physics: materials science; rheology Exact sciences and technology HEAT TRANSFER Laser surface remelting LASER WELDING LASERS MATERIALS SCIENCE Melting Metals. Metallurgy MICROHARDNESS Microroughness MICROSTRUCTURE Morphology OPTICAL MICROSCOPY Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Production techniques Remelting SCANNING ELECTRON MICROSCOPY SEM Solidification Surface treatment SURFACE TREATMENTS SURFACES VICKERS HARDNESS VOLTAMETRY Weight reduction X-RAY DIFFRACTION XRD Laser surface remelting Atomic force microscopy Corrosion Microroughness SEM XRD Al–Fe alloys Scanning electron microscopy Aluminium base alloys Aeronautic industry Aerospace industry Morphology Al-Fe alloys Application Laser fusion
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Summary:	Laser beam welding has recently been incorporated into the fabrication process of aircraft and automobile structures. Surface roughness is an important parameter of product quality that strongly affects the performance of mechanical parts, as well as production costs. This parameter influences the mechanical properties such as fatigue behavior, corrosion resistance, creep life, etc., and other functional characteristics such as friction, wear, light reflection, heat transmission, lubrification, electrical conductivity, etc. The effects of laser surface remelting (LSR) on the morphology of Al–Fe aerospace alloys were examined before and after surface treatments, using optical microscopy (OM), scanning electron microscopy (SEM), low‐angle X‐ray diffraction (LA‐XRD), atomic force microscopy (AFM), microhardness measurements (Vickers hardness), and cyclic voltammetry. This analysis was performed on both laser-treated and untreated sanded surfaces, revealing significant differences. The LA‐XRD analysis revealed the presence of alumina, simple metals and metastable intermetallic phases, which considerably improved the microhardness of laser‐remelted surfaces. The morphology produced by laser surface remelting enhanced the microstructure of the Al–Fe alloys by reducing their roughness and increasing their hardness. The treated surfaces showed passivity and stability characteristics in the electrolytic medium employed in this study. ► The samples laser-treated and untreated showed significant differences. ► The La-XRD revealed the presence of alumina in Al–1.5wt.% Fe. ► The laser-treated reducing the roughness and increasing the hardness. ► The laser-treated surfaces showed characteristic passive in the electrolytic medium. ► The laser-treated is a promising technique for applications technological.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	1044-5803 1873-4189
DOI:	10.1016/j.matchar.2012.08.011