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

被引：8
|
作者：
Romanova, Varvara [1 ,2 ]
Balokhonov, Ruslan [1 ,2 ]
Zinovieva, Olga [1 ]
Shakhidjanov, Valery [3 ]
机构：
[1] Russian Acad Sci, Inst Strength Phys & Mat Sci, Pr Acad 2-4, Tomsk 634055, Russia
[2] Natl Res Tomsk Polytech Univ, Pr Lenina 30, Tomsk 634050, Russia
[3] Natl Res Tomsk State Univ, Pr Lenina 36, Tomsk 634050, Russia
来源：
COMPUTATIONAL MATERIALS SCIENCE | 2016年 / 116卷
基金：
俄罗斯科学基金会;
关键词：
Titanium alloys; Surface hardening; Deformation-induced roughening; Microstructure-based simulation; Crystal plasticity; GRAIN-ORIENTATION; BEHAVIOR; TEXTURE; ROUGHNESS; STRAINS; SHEETS; METALS;
D O I：
10.1016/j.commatsci.2015.09.045
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A three-dimensional numerical analysis is performed of the deformation-induced roughening in polycrystalline specimens with and without surface-hardened layers. Three-dimensional microstructurebased 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. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：96 / 102
页数：7
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