Chemical composition and heat treatment influence on duplex stainless steels fatigue crack propagation resistance

Issue title: Special Issue: Proceedings of a Special Symposium in the Honor of David M. R. Taplin

Guest editors: Ashok Saxena and Toshimitsu Yokobori Jr.

Article type: Research Article

Authors: Iacoviello, Francesco^a; | Di Cocco, Vittorio^a | Franzese, Ester^a

Affiliations: [a] Università di Cassino e del Lazio Meridionale, DiCeM, via G. Di Biasio 43, Cassino, 03043, Italy

Correspondence: [*] Corresponding author. E-mail: [email protected]

Abstract: Austeno-ferritic (duplex) stainless steels are prone to age hardening and to embrittle over a wide temperature range depending on their chemical composition and, obviously, on the heat treatment conditions. This is mainly due to precipitation phenomena that occur inside ferritic grain and at ferrite-austenite grain boundaries with a kinetic that is influenced by the steel chemical composition and by the temperature. This work aims to offer a complete view of the influence of the chemical composition on the DSSs fatigue crack propagation, considering different ageing temperatures and different loading conditions.

Keywords: Duplex stainless steel, microstructure, fatigue, heat treatment

DOI: 10.3233/SFC-180226

Journal: Strength, Fracture and Complexity, vol. 11, no. 2-3, pp. 253-263, 2018