Gláucio Soares da Fonseca

A novel approach to assess hydrogen embrittlement susceptibility in sheared edges of AHSS using hole expansion testing with localized cathodic charging

Rafael Oliveira Santos, Andresa Rodrigues de Oliveira, Elivelton Alves Ferreira, Caio Rezende Martins et autres

Advanced high-strength steels (AHSS) are susceptible to edge fracture and hydrogen embrittlement, particularly when both occur simultaneously. This work proposes a novel methodology for evaluating hydrogen embrittlement susceptibility at sheared edges by integrating an ex-situ cathodic hydrogen-charging system into the hole expansion …

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Microstructural Evolution, Sigma Phase Morphology, and Localized Corrosion Behavior in UNS S32750 Superduplex Stainless Steel

Priscila Sousa Nilo Mendes, Patricia Sousa Nilo Mendes Raider Leoni, Elivelton Alves Ferreira, Gláucio Soares da Fonseca

The effects of sigma (σ) phase morphology and distribution on the corrosion behavior of superduplex stainless steel (SDSS) were investigated. The aim of this study was to establish the relationship among distinct σ-phase morphologies, chromium redistribution, and the resulting corrosion mechanisms using …

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Design of Experiments in Corrosion Research on Duplex Stainless Steels: A Systematic and Bibliometric Review

Kelly Cristine Franco de Azevedo, Fernando Augusto Silva Marins, Messias Borges Silva, Gláucio Soares da Fonseca

The corrosion behavior of duplex, superduplex, and hyperduplex stainless steels is influenced by complex interactions among compositional, microstructural, processing, and environmental variables. In this context, Design of Experiments (DOE) has been applied as a systematic approach to investigate such multivariate effects. This …

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Comportamento em tração uniaxial de uma chapa de aço 22MnB5 com revestimento Fe-Zn sob condições de estampagem a quente

Duílio Norberto Ferronatto Leite, Daniel Alexandre da Costa Ximenes, Gláucio Soares da Fonseca, Luciano Pessanha Moreira

Robustez de propriedades mecânicas do ferro fundido austemperado nodular: abordagem integrando simulação de Monte Carlo e Taguchi

Kelly Cristine Franco de Azevedo, Fernando Augusto da Silva Marins, Gláucio Soares da Fonseca

Comparação termodinâmica da nucleação da fase sigma em aços inoxidáveis superduplex submetidos a diferentes graus de deformação

Luis Paulo da Silva Vitorino, Gláucio Soares da Fonseca

Avaliação eletroquímica da formação da fase sigma em aço inoxidável superduplex por LSV

Patricia Sousa Nilo Mendes Raider Leoni, Priscila Sousa Nilo Mendes, Gláucio Soares da Fonseca, Elivelton Alves Ferreira

INFLUÊNCIA DA DEFORMAÇÃO PLÁSTICA SEVERA NA CINÉTICA DE PRECIPITAÇÃO DA FASE SIGMA EM AÇO INOXIDÁVEL SUPERDUPLEX

Luis Paulo da Silva Vitorino, Gláucio Soares da Fonseca

PDF | Aços inoxidáveis superduplex (AISD) combinam elevada resistência mecânica e à corrosão devido à microestrutura bifásica austenita-ferrita. A formação da fase sigma (σ), entre 650 °C e 900 °C, compromete essas propriedades. Este estudo analisou o efeito da prensagem em canais …

Influence of austenitizing, quenching, and tempering on the hardness and corrosion resistance in martensitic stainless steel EN 1.4116

Gláucio Soares da Fonseca, Kateryne Hamberger Ferreira, Silvana Carreiro de Oliveira, Priscila Sousa Nilo Mendes et autres

Martensitic stainless steels (MSS) are a vital class of steel used in various sectors, including aerospace, petrochemicals, and cutlery, due to their excellent properties, such as high mechanical strength and corrosion resistance. Research has shown that austenitizing treatment can have conflicting effects …

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Improvement of rust prevention by inclusion of 2D zeolite and graphene in oil-based soft coating

Thiago de Souza Martins, Bhetina Cunha Gomes, Daniel Alexandre da Costa Ximenes, Mendelssolm Kister de Pietre et autres

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Development of Chitosan Scaffold Carrier Device for Absorption and Controlled Release of Iron Chloride Using In Vitro Methods of Characterization

Ingrid Russoni de Lima, Márcio Teodoro Fernandes, Cristiane Xavier Resende, Bonifácio Oliveira Fialho et autres

Abstract: Chitosan spherical scaffolds, derived from the deacetylation of chitin, are natural polymers with significant potential, though challenges remain in optimizing their properties. The use of chitosan as a carrier for the controlled release of iron chloride is not yet fully established, …

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ANALYSIS OF A GFRP STRUCTURAL BOLTED CONNECTION

Gláucio Soares da Fonseca, Joaquin D. Vieira

Composite materials have gained space in civil engineering applications due to the corrosion resistance, low density and attractive mechanical and chemical properties. As an alternative composite material, pultruded glass fiber reinforced polymer (pGFRP), can be used in many structural applications, like telecommunications …

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