Work

Modelling the effect of carbide population and bainitic grain size on the fracture toughness of three forged low alloy steels

Year: 2025

Type: article

Abstract: Fracture toughness of three low alloy quenched and tempered bainitic steels with similar chemical compositions but different manufacturing routes have been characterized in the Ductile to Brittle Transition (DBT) domain. One of these materials exhibits a much larger DBT temperature than the two other materials. The essential microstructural particularity of this material is its grain size, twice larger than the one of the two other materials. The Microstructure Informed Brittle Fracture model (MIBF) is modified to integrate grain size effects into the definition of the critical size of carbides used to compute cleavage initiation probability. The modified model predicts fairly well the different DBT temperatures of the three materials.

Source: Procedia Structural Integrity

DOI: 10.1016/j.prostr.2025.06.186

Authors: Cainã Bemfica, Ludovic Vincent, Bernard Marini, Jean-Philippe Mathieu, Pierre Joly

Institutions: Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, CEA Paris-Saclay - Etablissement de Saclay, Service de Recherche en Matériaux et procédés Avancés, Framatome (France)

Language: English

Topic: Microstructure and Mechanical Properties of Steels

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funders: Centro de Ecológia Aplicada, Electricité de France

OpenAlex ID: W4412437479

FWCI:

Cites: 13

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Related to: 10