Microstructure, mechanical properties and corrosion resistance of boron-modified stainless steels processed by additive manufacturing

• Grant number: 19/05885-7
• Support Opportunities: Scholarships in Brazil - Doctorate
• Effective date (Start): August 01, 2019
• Effective date (End): January 31, 2024
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Claudemiro Bolfarini
• Grantee: Brenda Juliet Martins Freitas
• 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): 21/10735-4 - Microstructure, mechanical properties, and corrosion resistance of boron-modified stainless steels processed by additive manufacturing, BE.EP.DR

Abstract

The materials used in the production of parts of the oil and chemical industries are often subjected to severe wear and corrosion conditions. Stainless steels exhibit a great combination of mechanical and corrosion resistance; however, they also exhibit a relative low wear resistance. Recent studies performed in the DEMa-UFSCar, supported by FAPESP and Petrobrás, show that the addition of boron in stainless steels composition is responsible for a significant wear resistance enhancement. Moreover, a novel project aiming the study of stainless steels processed by additive manufacturing is been supported by FAPESP and Petrobrás, since this processing route can be used to produce in-service failed parts of the offshore platforms in a very short time. Therefore, this doctorate proposal is dedicated to evaluate the processing-microstructure-properties relationship of boron-modified super duplex stainless steels processed by additive manufacturing (selective laser melting), regarding the microstructural evolution, the mechanical properties and the wear and corrosion resistance. (AU)

Scientific publications

(4)

(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)

FREITAS, BRENDA JULIET MARTINS; RODRIGUES, LUANA CRISTINA MIGUEL; CLAROS, CESAR ADOLFO ESCOBAR; BOTTA, WALTER JOSE; KOGA, GUILHERME YUUKI; BOLFARINI, CLAUDEMIRO. Ferritic-induced high-alloyed stainless steel produced by laser powder bed fusion (L-PBF) of 2205 duplex stainless steel: Role of microstructure, corrosion, and wear resistance. Journal of Alloys and Compounds, v. 918, p. 13-pg., 2022-10-15. (19/05885-7)

RODRIGUES, L. C. M.; KOGA, G. Y.; FREITAS, B. J. M.; FIGUEIRA, G.; GARGARELLA, P.; BOLFARINI, C.; KIMINAMI, C. S.; BOTTA, W. J.. Wear-resistant Fe68Cr8Mo4Nb4B16 glass former coatings-From powder production by gas atomization to coating build-up by Laser Powder Bed Fusion. SURFACE & COATINGS TECHNOLOGY, v. 441, p. 12-pg., 2022-07-15. (13/05987-8, 19/05885-7, 19/01829-5, 17/27031-4, 21/08514-0)

MARTINS FREITAS, BRENDA JULIET; DE OLIVEIRA, VINICIUS ANTONIO; GARGARELLA, PITER; KOGA, GUILHERME YUUKI; BOLFARINI, CLAUDEMIRO. Microstructural characterization and wear resistance of boride-reinforced steel coatings produced by Selective Laser Melting (SLM). SURFACE & COATINGS TECHNOLOGY, v. 426, NOV 25 2021. (17/27031-4, 18/23810-1, 19/05885-7)

FREITAS, BRENDA JULIET MARTINS; KOGA, GUILHERME YUUKI; MENDES, MARCIO ANDREATO BATISTA; KIMINAMI, CLAUDIO SHYINTI; BOTTA, WALTER JOSE; BOLFARINI, CLAUDEMIRO. Ductile and Corrosion-Resistant Aluminum Alloy From Recycled Secondary Aluminum Scraps Containing Iron Impurities. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, v. 54, n. 4, p. 18-pg., 2023-06-05. (19/05885-7)