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Rapid solidification of nanocrystalline Al-Fe-Nb alloys and obtaining of coatings through laser cladding: microstructure and corrosion behaviour

Grant number: 16/08277-0
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2016
Effective date (End): May 31, 2017
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Carlos Alberto Della Rovere
Grantee:Fabio Yuji Kachiwazaki
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

The surface treatments through laser that result in phase transformations solid state and the production of coatings for advanced applications in order to improve wear and corrosion resistance, are characterized as one of the main materials processing alternatives that brings together the possibility of obtaining, refined microstructures, metastable, nano and quasicrystalline and amorphous structure, with significant improvements in properties of metallic alloys when compared with commercial alloys or crystalline slowly solidified though conventional metallurgical processing routes. The objective of this project is the processing and characterization through rapid solidification of Nanocrystalline Al-Fe-Nb alloys and obtaining of coatings through Laser Cladding using spray forming in the different products obtained, deposit and overspray powder, respectively. It will be studied the rapid solidification production of coating through atomized powders of Al-Fe-Nb alloys over commercially pure aluminum, using Laser Cladding and it respective microstructure characterization and corrosion behavior. The characterization techniques used in this work will be X-ray diffraction (XRD), optical microscopy (OM) and scanning electron microscopy (SEM) coupled to energy dispersive spectroscopy (EDS). Vicker microhardness measurements will be done as well along the tracks. The corrosion behavior will be studied via polarization tests. (AU)