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Investigation on the localized corrosion and the fatigue corrosion resistance of high strength aluminum alloys joined by friction stir welding (FSW)

Grant number: 13/13235-6
Support type:Research Projects - Thematic Grants
Duration: June 01, 2015 - May 31, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Isolda Costa
Grantee:Isolda Costa
Home Institution: Instituto de Pesquisas Energéticas e Nucleares (IPEN). Secretaria de Desenvolvimento Econômico (São Paulo - Estado). São Paulo , SP, Brazil
Co-Principal Investigators:Cecilio Sadao Fugivara ; Hercílio Gomes de Melo ; Waldek Wladimir Bose Filho
Assoc. researchers:Cassius Olivio Figueiredo Terra Ruchert ; Cristiane Reis Martins ; Jean Vicente Ferrari ; Marina Magnani
Associated grant(s):15/13884-0 - Study of the localized corrosion and characterization of fatigue-corrosion in the welded region of high-strength aluminium alloys welded by FSW, AP.EMU
Associated scholarship(s):18/14082-2 - Hydrogen effect on the electrochemical behavior of aluminum alloys welded by friction stir welding (FSW), BP.IC
18/13545-9 - Structural and electrochemical characterization of aluminium alloys welded by friction stir welding (FSW), BP.IC
18/06880-6 - Use of localized electrochemical techniques for the study of corrosion of of high strength aluminum alloys joined by friction (FSW), BP.PD
+ associated scholarships 17/03095-3 - Investigation on corrosion susceptibility of Al-Cu-Li alloys by friction stir welding (FSW) through scanning vibrating electrode technique (SVET) , BP.PD
17/05898-6 - Microstructural and localized corrosion resistance characterization of base metal and welding zones of AA2050 aluminum alloy welded by friction stir welding(FSW), BP.IC
16/20572-7 - Using localized electrochemical impedance spectroscopy (LEIS) for corrosion of high mechanical strength aluminum alloys welded by FSW, BP.PD
16/09682-5 - Microstructural characterization and localized corrosion resistance study of the AA7050 aluminium alloy, BP.IC
16/10205-7 - Microstructural evaluation of AA2198-T851 alloy welded by friction stir welding (FSW), BP.IC - associated scholarships

Abstract

Friction stir welding (FSW) was developed in the early 90s, and constituted a major breakthrough for joining Al alloys with high mechanical resistance. The procedure involves the use of a non-consumable rotating tool applied in the regions that must be joined, which are held together by applying a forging pressure. The heating caused by the tool rotation and by the plastic deformation, combined with the force applied to align the plates, causes the junction of the parts in the solid state, resulting in resistant and virtually free of defects welds. Despite of the fact that the FSW process causes neither the fusion of the material nor introduces a new material in the structure, the heating of the surface caused by the friction of the tool and by the plastic deformation results in micro structural changes, modifying the corrosion resistance of the welded area with the possible formation of galvanic couples. The aim of this project is to investigate the corrosion resistance of high strength Al alloys joined by FSW by means of electrochemical techniques with high spatial resolution and standard fatigue tests. The electrochemical techniques that will be employed are Localized Electrochemical Impedance Spectroscopy (LEIS), Scanning Reference Electrode Technique (SRET), Scanning Vibrating Electrode Technique (SVET) and Scanning Electrochemical Microscopy (SECM). These techniques, due to their high spatial resolution, will allow identifying galvanic couples and determining the anodic cathodic areas. Besides, the fatigue-corrosion resistance of the Al alloys will be investigated in a salt spray environment. The correlation microstructure-corrosion and fatigue resistances will be evaluated to investigate the effect of heating during FSW on the microstructure and consequently on the susceptibility to corrosion of the different regions and how they correlate to mechanical properties of the welded and the heat affected areas. (AU)

Articles published in Agência FAPESP about the research grant
Technique permits scale gains in the production of materials with graphene 

Scientific publications (10)
(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)
CARVALHO MACHADO, CARULINE DE SOUZA; DONATUS, UYIME; MILAGRE, MARIANA X.; MOGILI, NAGA V. V.; GIORJAO, RAFAEL A. R.; KLUMPP, RAFAEL EMIL; ARAUJO, JOAO VICTOR DE S.; FERREIRA, RAPHAEL OLIVEIRA; COSTA, ISOLDA. Correlating the Modes of Corrosion with Microstructure in the Friction Stir Welded AA2198-T8 Alloy in Aqueous Hydrogen Peroxide-Chloride Medium. CORROSION, v. 75, n. 6, p. 628-640, JUN 2019. Web of Science Citations: 0.
GOMES, MAURILIO PEREIRA; COSTA, ISOLDA; PEBERE, NADINE; ROSSI, JESUALDO LUIZ; TRIBOLLET, BERNARD; VIVIER, VINCENT. On the corrosion mechanism of Mg investigated by electrochemical impedance spectroscopy. Electrochimica Acta, v. 306, p. 61-70, MAY 20 2019. Web of Science Citations: 0.
MILAGRE, MARIANA X.; DONATUS, UYIME; MACHADO, CARULINE S. C.; ARAUJO, JOAO VICTOR S.; DA SILVA, REJANE MARIA P.; DE VIVEIROS, BARBARA VICTORIA G.; ASTARITA, ANTONELLO; COSTA, ISOLDA. Comparison of the corrosion resistance of an Al-Cu alloy and an Al-Cu-Li alloy. CORROSION ENGINEERING SCIENCE AND TECHNOLOGY, p. 1-11, APR 2019. Web of Science Citations: 0.
DONATUS, UYIME; FERREIRA, RAPHAEL OLIVEIRA; MOGILI, NAGA VISHNU VARDAN; GONCALVES DE VIVEIROSA, BARBARA VICTORIA; MILAGRE, MARIANA XAVIER; COSTA, ISOLDA. Corrosion and anodizing behaviour of friction stir weldment of AA2198-T851 Al-Cu-Li alloy. Materials Chemistry and Physics, v. 219, p. 493-511, NOV 1 2018. Web of Science Citations: 0.
DONATUS, UYIME; BERBEL, LARISSA O.; COSTA, ISOLDA. Qualitative use of potentiodynamic polarization and anodic hydrogen evolution in the assessment of corrosion susceptibility in AA2198-T851 Al-Cu-Li alloy. MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, v. 69, n. 10, p. 1375-1388, OCT 2018. Web of Science Citations: 3.
DONATUS, UYIME; GONCALVES DE VIVEIROS, BARBARA VICTORIA; DE ALENCAR, MAICON CAVALIERI; FERREIRA, RAPHAEL OLIVEIRA; MILAGRE, MARIANA XAVIER; COSTA, ISOLDA. Correlation between corrosion resistance, anodic hydrogen evolution and microhardness in friction stir weldment of AA2198 alloy. MATERIALS CHARACTERIZATION, v. 144, p. 99-112, OCT 2018. Web of Science Citations: 4.
MILAGRE, MARIANA X.; MOGILI, NAGA V.; DONATUS, UYIME; GIORJAO, RAFAEL A. R.; TERADA, MAYSA; ARAUJO, JOAO VICTOR S.; MACHADO, CARULINE S. C.; COSTA, ISOLDA. On the microstructure characterization of the AA2098-T351 alloy welded by FSW. MATERIALS CHARACTERIZATION, v. 140, p. 233-246, JUN 2018. Web of Science Citations: 3.
DE SOUSA ARAUJO, JOAO VICTOR; DONATUS, UYIME; QUEIROZ, FERNANDA MARTINS; TERADA, MAYSA; MILAGRE, MARIANA XAVIER; DE ALENCAR, MAICON CAVALIERI; COSTA, ISOLDA. On the severe localized corrosion susceptibility of the AA2198-T851 alloy. Corrosion Science, v. 133, p. 132-140, APR 1 2018. Web of Science Citations: 6.
DONATUS, UYIME; TERADA, MAYSA; OSPINA, CARLOS RAMIREZ; QUEIROZ, FERNANDA MARTINS; SANTOS BUGARIN, ALINE FATIMA; COSTA, ISOLDA. On the AA2198-T851 alloy microstructure and its correlation with localized corrosion behaviour. Corrosion Science, v. 131, p. 300-309, FEB 2018. Web of Science Citations: 14.
DE ABREU, CAIO PALUMBO; COSTA, ISOLDA; DE MELO, HERCILIO GOMES; PEBERE, NADINE; TRIBOLLET, BERNARD; VIVIER, VINCENT. Multiscale Electrochemical Study of Welded Al Alloys Joined by Friction Stir Welding. Journal of the Electrochemical Society, v. 164, n. 13, p. C735-C746, 2017. Web of Science Citations: 1.

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