Ductile fracture of high entropy alloys: From the design of an experimental campaign to the development of a micromechanics-based modeling framework

Hilhorst, Antoine; Leclerc, Julien; Pardoen, Thomas; Jacques, Pascal J.; Noels, Ludovic; Nguyen, Van Dung

doi:10.1016/j.engfracmech.2022.108844

Article (Scientific journals)

Ductile fracture of high entropy alloys: From the design of an experimental campaign to the development of a micromechanics-based modeling framework

Hilhorst, Antoine; Leclerc, Julien; Pardoen, Thomas et al.

2022 • In Engineering Fracture Mechanics, 275, p. 108844

Peer Reviewed verified by ORBi Dataset

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https://hdl.handle.net/2268/295292

DOI
10.1016/j.engfracmech.2022.108844

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Keywords :

Ductile fracture; High entropy alloy; Constitutive model; Experiment

Abstract :

[en] Cantor-type high entropy alloys form a new family of metallic alloys characterised by a combination of high strength and high fracture toughness. An experimental study on the CoCrNi alloy is first performed to determine the damage and fracture mechanisms under various stress states. A micromechanics-based ductile fracture model is identified and validated using these experimental data. The model corresponds to a hyperelastic finite strain multi-yield surface constitutive description coupled with multiple nonlocal variables. The yield surfaces consist of three distinct nonlocal solutions corresponding to three different modes of void expansion within an elastoplastic matrix: a void growth mode governed by a Gurson-based yield surface corrected for shear effects, an internal necking-driven coalescence mode governed by an extension of the Thomason yield surface based on the maximum principal stress, and a shear-driven coalescence mode governed by the maximum shear stress. This advanced formulation embedded in large strain finite element setup captures the effects not only of the stress triaxiality but also of the Lode variable. In particular, the analysis shows that a failure model accounting for these two invariants of the stress tensor captures the fracture in high-entropy alloys over a wide range of conditions.

Research Center/Unit :

A&M - Aérospatiale et Mécanique - ULiège

Disciplines :

Materials science & engineering
Mechanical engineering

Author, co-author :

Hilhorst, Antoine; UCL - Université Catholique de Louvain [BE] > iMMC > IMAP

Leclerc, Julien ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)

Pardoen, Thomas; UCL - Université Catholique de Louvain [BE] > iMMC > IMAP

Jacques, Pascal J.; UCL - Université Catholique de Louvain [BE] > iMMC > IMAP

Noels, Ludovic ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)

Nguyen, Van Dung ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)

Language :

English

Title :

Ductile fracture of high entropy alloys: From the design of an experimental campaign to the development of a micromechanics-based modeling framework

Publication date :

29 November 2022

Journal title :

Engineering Fracture Mechanics

ISSN :

0013-7944

eISSN :

1873-7315

Publisher :

Elsevier, Netherlands

Volume :

275

Pages :

108844

Peer reviewed :

Peer Reviewed verified by ORBi

Name of the research project :

EntroTough

Funders :

Walloon region

Funding number :

1610154

Funding text :

The research has been funded by the Walloon Region under the agreement no. 1610154-EntroTough in the context of the 2016 WalInnov call.

Data Set :

Data of “ductile fracture of high entropy alloys: From the design of an experimental campaign to the development of a micromechanics-based modeling framework”

Commentary :

NOTICE: this is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Fracture Mechanics 275 (2022) 108844, DOI: 10.1016/j.engfracmech.2022.108844

Available on ORBi :

since 29 September 2022

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Hilhorst, A., Leclerc, J., Pardoen, T., Jacques, P.J., Noels, L., Nguyen, V.-D., Data of “ductile fracture of high entropy alloys: From the design of an experimental campaign to the development of a micromechanics-based modeling framework”. 2022, 10.5281/zenodo.7093549.