PSI - Issue 82

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2026) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 82 (2026) 192–198

© 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID organizers Abstract Superduplex stainless steels (SDSSs) are high performance materials that achieve their best mechanical and corrosion resistance properties with a balanced microstructure of ferrite and austenite. The precipitation of small quantities of deleterious phases, such as chi ( c ) and sigma ( s ) phases, is the same time difficult to detect and harmful to the overall properties. In this work a wrought W-alloyed superduplex UNS S39274 steel was subjected to thermal cycles to introduce different quantities of c and s phases in the microstructure. The digital image processing (DIP) technique was used in the SEM images to quantify the volume fraction of deleterious phases. The samples were inspected by mechanical (hardness), magnetic (ferritoscope) and electrochemical (Linear Sweep Voltammetry, LSV) methods. Ferritoscope and LSV methods were able to detect c and s phases amount as low as 1.5%, which provoked a significant decrease in toughness . © 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID organizers Keywords: superduplex stainless steels; intermetallics precipitation; non-destructive testing 8th International Conference on Structural Integrity and Durability (ICSID2025) Effects and detection of deleterious phases in W-alloyed UNS S39274 superduplex stainless steel S.S.M. Tavares a, *, E.A. Ponzio b , M.D.C. Ignácio b , I.M.V. Silva c , A.R. Pimenta a,c,d , G. Zeeman e a Universidade Federal Fluminense, Escola de Engenharia, Pós-Graduação em Engenharia Mecânica, Rua Passo da Pátria, 156, (ZIP) 24210 240, Niterói, RJ, Brazil; b Universidade Federal Fluminense, Instituto de Química, Rua Outeiro de São João Batista, s/n, (ZIP) 24020-141, Niterói, RJ, Brazil; c Universidade do Estado do Rio de Janeiro, Programa de Pós-Graduação em Engenharia Mecânica, Rua Fonseca Teles, 121,(ZIP) 20940-903, Rio de Janeiro, RJ, Brazil; d Instituto Federal do Rio de Janeiro, Laboratório de Instrumentação e Simulação Computacional LISComp, Rua Sebastião Lacerda, 01, (ZIP) 26600-000, Paracambi, RJ, Brazil; e Tecmetal, Estrada dos Bandeirantes, 28.000, (ZIP) 22785-575, RJ, Rio de Janeiro, Brazil

* Corresponding author. Tel.: +55 21 998692302 E-mail address: ssmtavares@id.uff.br (S.S.M.Tavares)

2452-3216 © 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID organizers

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID organizers 10.1016/j.prostr.2026.04.030