Microstructure-informed statistical modelling of cleavage fracture in high strength steels considering through-thickness inhomogeneities

Journal article (2022)

Authors

Quanxin Jiang Team Vera Popovich - Mechanical, Maritime and Materials Engineering
V. Morete Barbosa Bertolo Team Vera Popovich - Mechanical, Maritime and Materials Engineering
V. Popovich Team Vera Popovich - Mechanical, Maritime and Materials Engineering
J. Sietsma Team Kevin Rossi - Mechanical, Maritime and Materials Engineering
C.L. Walters TNO, Ship Hydromechanics and Structures - Mechanical, Maritime and Materials Engineering
Research Group
Team Vera Popovich (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 Quanxin Jiang, V. Morete Barbosa Bertolo, V. Popovich, J. Sietsma, C.L. Walters
DOI: https://doi.org/10.1016/j.engfracmech.2022.108432
More Info
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Published Date

2022

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Vera Popovich

Abstract

Thick section S690 QT steel is modelled with a modified multibarrier model that is based on the weakest-link mechanism. Segregation bands are modelled as discrete layers which have different grain size, yield properties, and local fracture parameters from outside of the bands. The results show that embrittlement from segregation bands can only be adequately reflected if the inhomogeneities of the fracture parameters are accounted for. The present methodology quantitively captures the cooperation of complex microstructural features in cleavage and can facilitate the trade-off between the effects of various microstructural parameters in toughness control.