PSI - Issue 35

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Procedia Structural Integrity 35 (2022) 203–209

2nd International Workshop on Plasticity, Damage and Fracture of Engineering Materials The effect of texture sharpness on deformation-induced surface roughening in α -titanium 2nd International Workshop on Plasticity, Damage and Fracture of Engineering Materials The effect of texture sharpness on deformation-induced surface roughening in α -titanium

E. Emelianova a,b* , M. Pisarev a,b , O. Zinovieva a , V. Romanova a a Institute of Strength Physics and Material Science, Russian Academy of Sciences, Tomsk 634055, Russia b National Research Tomsk State University, Tomsk 634050, Russia E. Emelianova a,b* , M. Pisarev a,b , O. Zinovieva a , V. Romanova a a Institute of Strength Physics and Material Science, Russian Academy of Sciences, Tomsk 634055, Russia b National Research Tomsk State University, To sk 634050, Russia

© 2021 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 IWPDF 2021 Chair, Tuncay Yalçinkaya Abstract The deformation behavior of hexagonal metals is known to be strongly affected by a material texture. This paper aims at understanding the effect of a basal texture on the deformation- induced surface roughness in α -titanium. The effect of the basal texture severity on the deformation behavior is estimated for polycrystals characterized by the same grain geometry and different crystallographic orientations. For this purpose, three-dimensional polycrystalline models with the grain morphology and crystallographic orientations integrated explicitly are constructed using the step-by-step packing method. The texture severity is shown to strongly affect mesoscale roughness patterns. A more pronounced basal texture leads to suppression of the microscale surface roughness formed by displacements of individual grains perpendicular to the free surface (the orange peel pattern) and mesoscopic surface roughness formed by the displacements of grain groups. The basal texture reduces the material ability to deform perpendicular to the loading axis, while the prismatic slip gives rise to in-plane shear banding. © 2021 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 IWPDF 2021 Chair, Tuncay Yalçinkaya Keywords: surface roughness; texture; titanium; CPFEM simulations 1. Introduction The material free surface, flat at an undeformed state, becomes rough under loading (Li and Fu, 2019). This is a multiscale phenomenon referred to as deformation-induced surface roughening encompassing out-of-plane displacements of a free surface throughout all scales from micro to macro. Abstract The deformation behavior of hexagonal metals is known to be strongly affected by a material texture. This paper aims at understanding the effect f a basal texture on the deformation- induced surf ce roughness in α -titanium. The effect of the bas l texture severity on th deformation behavior is estimated for polycrystals ch racterized by the same grain geometry and different crystallographic orientations. F r this purpose, thre -dimensional polycrystalline models with the grain morphology and r t ll r i orientations integrated explicitly are constructed using the step-by-step packing met od. The texture severity is shown to strongly affect mesoscale roughness patterns. A mor pronounc d basal texture leads to suppression of the microscale urface rough ess formed by displacements of individual grains perpendicular to the fr e surface (the orange peel pattern) and mesoscopic surface roughness formed by the displacements of grain groups. The basal texture reduces the material ability to deform perpendicular to t e loading axis, while the pris atic slip ives rise to in-plane hear banding. © 2021 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 u der re ponsibility of IWPDF 2021 hair, Tuncay Yalçinkay Keywords: surface roughness; texture; titanium; CPFEM simulations 1. Introduction The material free surface, flat at an undeformed state, becomes rough under loading (Li and Fu, 2019). This is a multiscale phenomenon r ferred to as deformation-induced surface roughening encompassing out-of-plane displa ements of a free surfac throughout all scales from mi ro to macro.

* Corresponding author. Tel.: +7-382-228-6937; fax: +7-382-249-5576. E-mail address: emelianova@ispms.tsc.ru * Corresponding author. Tel.: +7-382-228-6937; fax: +7-382-249-5576. E-mail address: emelianova@ispms.tsc.ru

2452-3216 © 2021 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 ICSID 2020 Organizers. 2452-3216 © 2021 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 ICSID 2020 Organizers.

2452-3216 © 2021 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 IWPDF 2021 Chair, Tuncay Yal ç inkaya 10.1016/j.prostr.2021.12.066