PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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ScienceDirect

Procedia Structural Integrity 23 (2019) 451–456

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. Abstract The study pre ents a framework of simulating the progressive damage under cyclic loading with the stre s ra io R=0.1 in the WC Co hardmetals at meso- nd micros ale by finite element method. A two-and-a-half-dimensional microstructure m del is created based on el c ron backscatter diffraction micrographs. It i able to capture the major m crostructural characteristics of this material and preserve the local crystalline orientation. A set of anisotropic lasticity constants is adopted for brittle WC phase, and elast - pl stic material parameters for the ductile bind matrix are derived from fundamental static and dynamic testing conducted on a roscopic binder-lik alloy specimen . Proper f ilure models are applied for b th phases to represent their respective failure mechani ms. Taki g the residual stresses as an initial condition, the study also introduces a method to investigate the influence of residual stresses on the fa igue performance of hardmetals. The numerical implementation is realized with user subroutines in the commercial finite element solver Abaqus. © 201 9 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture Numerical modeling of the progressive damage in the microstructure of WC-Co hardmetals under fatigue loading Keng Jiang a, *, Alexander Bezold a , Christoph Broeckmann a a Institute for Materials Applications in Mechanical Engineering, RWTH Aachen University, Augustinerbach 4, 52062 Aachen, Germany Abstract The study presents a framework of simulating the progressive damage under cyclic loading with the stress ratio R=0.1 in the WC Co hardmetals at meso- and microscale by finite element method. A two-and-a-half-dimensional microstructure model is created based on electron backscatter diffraction micrographs. It is able to capture the major microstructural characteristics of this material and preserve the local crystalline orientation. A set of anisotropic elasticity constants is adopted for brittle WC phase, and elasto plastic material parameters for the ductile binder matrix are derived from fundamental static and dynamic testing conducted on macroscopic binder-like alloy specimens. Proper failure models are applied for both phases to represent their respective failure mechanisms. Taking the residual stresses as an initial condition, the study also introduces a method to investigate the influence of residual stresses on the fatigue performance of hardmetals. The numerical implementation is realized with user subroutines in the commercial finite element solver Abaqus. 9th International Conference on Materials Structure and Micromechanics of Fracture Numerical modeling of the progressive damage in the microstructure of WC-Co hardmetals under fatigue loading Keng Jiang a, *, Alexander Bezold a , Christoph Broeckmann a a Institute for Materials Applications in Mechanical Engineering, RWTH Aachen University, Augustinerbach 4, 52062 Aachen, Germany 1. Introduction Tungsten carbide-cobalt (WC-Co) hardmetal is an outstanding representative of cemented carbides alloys. Since its invention in the early 20th century, WC-Co hardmetal has become one of the most commercially and technically successful material for engineering use. Driven by the increasing demand of WC-based products in automotive, 1. Introduction Tungste carbide-cobalt (WC-Co) hardmetal is an outst nding representativ of cemented carbides alloys. Since its invention in the early 20th century, WC-Co hardmetal has become one of the most commercially a d technically successful material for engineering use. Driven by the increasing demand of WC-based products in automotive, Keywords: WC-Co hardmetals; microstructure; residual stress; fatigue; finit element method Keywords: WC-Co hardmetals; microstructure; residual stress; fatigue; finit element method

* Corresponding author. Tel.: +49-241-8090620; fax: +49-241-8092266. E-mail address: k.jiang@iwm.rwth-aachen.de * Correspon ing author. Tel.: +49-241-8090620; fax: +49-241-8092266. E-mail address: k.jiang@iwm.rwth-aachen.de

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.128