Coatings of steel made of wear resistant nanocrystalline and amorphizable iron-based alloys

• Grant number: 14/13432-9
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Effective date (Start): November 01, 2014
• Effective date (End): April 30, 2017
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Conrado Ramos Moreira Afonso
• Grantee: Marcos Fernandes de Carvalho
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys, AP.TEM
• Associated scholarship(s): 15/22940-0 - Laser Cladding of Fe- and Ni-based Amorphizable And Nanocrystalline Alloys and Self-Lubricating Composites., BE.EP.PD

Abstract

The Laser processing of advanced metallic materials brings a lot of advantages when compared with the conventional processing routes of metallic materials, such as: increasing of productivity, reduction in operational costs, quality improvement and finishing of products, wider flexibility in production lines and amplifying project possibilities and application opportunities. 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, nanocrystalline, quasicrystalline and even amorphous structure, with significant improvements in properties of metallic alloys when compared with commercial alloys or their crystalline version slowly solidified though conventional metallurgical processing routes. The objective of this project is the obtaining of amorphizable and nanocrystalline multicomponent Fe-based metallic alloys through laser surface treatment and laser cladding in alloys processed by spray forming in the different products obtained: deposit and overspray powder, respectively. The execution of this proposal through collaborations with experienced research groups in the theme "laser surface treatment of amorphizable and nanocrystalline multicomponent Fe-based metallic alloys" is associated to the possibility de stabilish a new research area at the Department of Materials Engineering (DEMa/UFSCar). The microstructure characterization of these materials processed by laser will be facilitated due to the infrastructure offered by the laboratory of structural characterization (LCE), the center of characterization and development of materials (CCDM) together with the research labs of DEMa/UFSCar and our research group (Amorphous, Nanocrystalline and Metastable Metallic Alloys). The main techniques used in this work will be: X-ray Diffraction (XRD), thermal analysis (DSC/DTA/TG), scanning (SEM) and transmission electron microscopy (TEM/STEM/HRTEM) coupled to energy dispersive spectroscopy (EDS), besides measurement of mechanical properties such as Vickers microhardness. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DE CARVALHO, MARCOS FERNANDES; RIVA, RUDIMAR; FOGAGNOLO, JOAO BATISTA; KIMINAMI, CLAUDIO SHYINTI; MOREIRA AFONSO, CONRADO RAMOS. Metallic Glass Formation Upon Rapid Solidification of Fe60Cr8Nb8B24 (at%) Alloy through LASER Cladding and Remelting. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 20, n. 2, p. 580-587, 2017. (13/05987-8, 14/13432-9, 12/18429-0)

GIROTO, GIOVANA; GARGARELLA, PITER; RIVA, RUDIMAR; KIMINAMI, CLAUDIO SHYINTI; DE CARVALHO, MARCOS FERNANDES; MOREIRA AFONSO, CONRADO RAMOS. Laser Cladding of Fe-based Metallic Glass/MoS2 Self-lubricating Composites: Effect of Power and Scanning Speed. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 20, n. 2, p. 836-841, 2017. (13/05987-8, 14/13432-9, 15/04062-6, 12/18429-0)