PSI - Issue 28

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Procedia Structural Integrity 00 (2020) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Procedia Structural Integrity 00 (2020) 000–000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 28 (2020) 2396–2403

1st Virtual European Conference on Fracture Macro- and micro-approach to locally multiaxial fatigue crack paths in oriented and non-oriented pearlitic microstructures 1st Virtual European Conference on Fracture Macro- and micro-approach to locally multiaxial fatigue crack paths in oriented and non-oriented pearlitic microstructures

Jesús Toribio*, Beatriz González, Juan-Carlos Matos Fracture & Structural Integrity Research Group (FSIRG), University of Salamanca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain Jesús Toribio*, Beatriz González, Juan-Carlos Matos Fracture & Structural Integrity Research Group (FSIRG), University of al manca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Abstract This paper offers a macro- and micro-approach to locally multiaxial fatigue crack paths in oriented and non-oriented pearlitic icrostructures, addressing the important role of microstructural evolution (orientation and packing closeness) during the manufacture process by cold drawing in the posterior fatigue performance of the pearlitic steel wires. Results show that fatigue crack paths are globally uniaxial (they develop in global mode I ) in both oriented and non-oriented pearlitic microstructures, whereas such fatigue crack paths are locally multiaxial (they develop in local mixed-mode with a zig-zag shape) in the two mentioned microstructures, the degree of packing closeness and orientation affecting the microstructural features ( micro-length and micro-deflection angle ) of the fatigue crack path , thereby determining their distinct fatigue performance. © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Abstract This paper offers a macro- and micro-approach to locally multiaxial fatigue crack paths in oriented and non-oriented pearlitic microstructures, addressing the important role of microstructural evolution (orientation and packing closeness) during the manufacture process by cold drawing in the posterior fatigue performance of the pearlitic steel wires. Results show that fatigue crack paths are globally uniaxial (they develop in global mode I ) in both oriented and non-oriented pearlitic microstructures, whereas such fatigue crack paths are locally multiaxial (they develop in local mixed-mode with a zig-zag shape) in the two mentioned microstructures, the degree of packing closeness and orientation affecting the microstructural features ( micro-length and micro-deflection angle ) of the fatigue crack path , thereby determining their distinct fatigue performance. Keywords: cold drawing; microstructural orientation; packing closeness; fatigue crack paths; locally multiaxial fatigue behaviour. Keywords: cold drawing; microstructural orientation; packing closeness; fatigue crack paths; locally multiaxial fatigue behaviour. 1. Introduction The role of material microstructure and crack configuration in the fatigue performance is now well known from the classical analyses by Kitagawa et al. (1975) and Suresh (1983). Specific studies in pearlitic microstructures were performed by Korda et al. (2006a, 2006b), Mutoh et al. (2007) and Toribio et al. (2009, 2014, 2015). 1. Introduction The role of material microstructure and crack configuration in the fatigue performance is now well known from the classical analyses by Kitagawa et al. (1975) and Suresh (1983). Specific studies in pearlitic microstructures were performed by Korda et al. (2006a, 2006b), Mutoh et al. (2007) and Toribio et al. (2009, 2014, 2015).

* Corresponding author. Tel.: +34-677566723; fax: +34-980545002. E-mail address: toribio@usal.es * Corresponding author. Tel.: +34-677566723; fax: +34-980545002. E-mail address: toribio@usal.es

2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an ope access article under t CC BY-NC-ND license (https://cr ativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.11.089