Numerical study of the surface hardening effect on the deformation-induced roughening in titanium polycrystals

Abstract

A three-dimensional numerical analysis is performed of the deformation-induced roughening in polycrystalline specimens with and without surface-hardened layers. Three-dimensional microstructure-based constitutive models are developed, using crystal plasticity, and employed in finite element calculations of uniaxial tension. Grain structure is shown to be responsible for free surface roughening under uniaxial loading. Microscale stresses acting normally to the free surface in the bulk of the material are associated with normal displacements. The surface-hardened layer moves the grain structure away from the free surface, smoothing out the microscale folds formed due to displacements of individual grains, while the mesoscale surface undulations remain clearly visible.

Original language	English
Pages (from-to)	96-102
Number of pages	7
Journal	Computational Materials Science
Volume	116
DOIs	https://doi.org/10.1016/j.commatsci.2015.09.045
Publication status	Published - 15 Apr 2016

Keywords

Crystal plasticity
Deformation-induced roughening
Microstructure-based simulation
Surface hardening
Titanium alloys

ASJC Scopus subject areas

Computer Science(all)
Chemistry(all)
Materials Science(all)
Mechanics of Materials
Physics and Astronomy(all)
Computational Mathematics

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10.1016/j.commatsci.2015.09.045

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title = "Numerical study of the surface hardening effect on the deformation-induced roughening in titanium polycrystals",

abstract = "A three-dimensional numerical analysis is performed of the deformation-induced roughening in polycrystalline specimens with and without surface-hardened layers. Three-dimensional microstructure-based constitutive models are developed, using crystal plasticity, and employed in finite element calculations of uniaxial tension. Grain structure is shown to be responsible for free surface roughening under uniaxial loading. Microscale stresses acting normally to the free surface in the bulk of the material are associated with normal displacements. The surface-hardened layer moves the grain structure away from the free surface, smoothing out the microscale folds formed due to displacements of individual grains, while the mesoscale surface undulations remain clearly visible.",

keywords = "Crystal plasticity, Deformation-induced roughening, Microstructure-based simulation, Surface hardening, Titanium alloys",

author = "Varvara Romanova and Ruslan Revovich Balokhonov and Olga Zinovieva and Valery Shakhidjanov",

year = "2016",

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doi = "10.1016/j.commatsci.2015.09.045",

language = "English",

volume = "116",

pages = "96--102",

journal = "Computational Materials Science",

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T1 - Numerical study of the surface hardening effect on the deformation-induced roughening in titanium polycrystals

AU - Romanova, Varvara

AU - Balokhonov, Ruslan Revovich

AU - Zinovieva, Olga

AU - Shakhidjanov, Valery

PY - 2016/4/15

Y1 - 2016/4/15

N2 - A three-dimensional numerical analysis is performed of the deformation-induced roughening in polycrystalline specimens with and without surface-hardened layers. Three-dimensional microstructure-based constitutive models are developed, using crystal plasticity, and employed in finite element calculations of uniaxial tension. Grain structure is shown to be responsible for free surface roughening under uniaxial loading. Microscale stresses acting normally to the free surface in the bulk of the material are associated with normal displacements. The surface-hardened layer moves the grain structure away from the free surface, smoothing out the microscale folds formed due to displacements of individual grains, while the mesoscale surface undulations remain clearly visible.

AB - A three-dimensional numerical analysis is performed of the deformation-induced roughening in polycrystalline specimens with and without surface-hardened layers. Three-dimensional microstructure-based constitutive models are developed, using crystal plasticity, and employed in finite element calculations of uniaxial tension. Grain structure is shown to be responsible for free surface roughening under uniaxial loading. Microscale stresses acting normally to the free surface in the bulk of the material are associated with normal displacements. The surface-hardened layer moves the grain structure away from the free surface, smoothing out the microscale folds formed due to displacements of individual grains, while the mesoscale surface undulations remain clearly visible.

KW - Crystal plasticity

KW - Deformation-induced roughening

KW - Microstructure-based simulation

KW - Surface hardening

KW - Titanium alloys

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