TY  - SER
AU  - Balokhonov,Ruslan R.
AU  - Emelianova,Evgeniya S.
AU  - Pisarev,Maxim
AU  - Dymnich,Ekaterina
AU  - Romanova,Varvara A.
TI  - Numerical study of the texture effect on deformation-induced surface roughening in titanium polycrystals
KW  - микроструктура
KW  - текстура
KW  - шероховатость поверхности
KW  - пластическая деформация
KW  - метод конечных элементов
KW  - статьи в журналах
N1  - Библиогр.: 24 назв
N2  - The influence of a texture on the mesoscale deformation-induced surface roughening in titanium
polycrystals is studied using direct microstructure-based simulations. Relying on the experimental
 data for commercial purity titanium, equiaxed grain conglomerates are generated by the
 method of step-by-step packing. The grain constitutive behavior is described in terms of crystal
 plasticity, with the grain orientations being assigned randomly or representing a basal texture.
 The micro- and mesoscale roughness evolution in the model polycrystals under uniaxial tension is
 calculated using ABAQUS/Explicit. In order to quantify mesoscale roughening, a dimensionless
 roughness parameter is calculated for a set of experimental and numerical roughness profiles
 evolving in the course of tension. The mesoscale roughness parameter is shown to grow nonlinearly
 with the plastic strain of the evaluated mesoscale regions. Particularly, it begins increasing
 rapidly in the region of neck formation well before necking becomes macroscopically
 evident. The basal texture is shown to significantly affect the plastic strain localization and
 roughness patterns. The mesoscale roughness, strongly pronounced in the untextured polycrystal,
 is mostly suppressed in the presence of texture. A set of in-plane shear bands are formed in the
 textured polycrystal at an angle of 45° to the tensile axis much like those observed experimentally
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000795078
ER  -