The effect of a textured surface layer on the deformation behavior of polycrystalline titanium

E. Emelianova, V. Romanova, E. Dymnich, M. Pisarev
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Abstract

The effect of a textured surface layer on the deformation behavior of surface-modified titanium is numerically investigated. A three-dimensional polycrystalline model accounting for the grain morphology was generated by a step-by-step packing method. A crystal plasticity-based constitutive model describing the anisotropic elastic-plastic behavior of individual grains is implemented in a dynamic boundary-value problem that is numerically solved using ABAQUS/Explicit finite element package. Two sets of calculations for polycrystalline models with textured and untextured surface layers were performed. Conclusions on the surface texture effect on the stress and strain fields and surface roughening in the surface and in the bulk of the polycrystals were drawn.The effect of a textured surface layer on the deformation behavior of surface-modified titanium is numerically investigated. A three-dimensional polycrystalline model accounting for the grain morphology was generated by a step-by-step packing method. A crystal plasticity-based constitutive model describing the anisotropic elastic-plastic behavior of individual grains is implemented in a dynamic boundary-value problem that is numerically solved using ABAQUS/Explicit finite element package. Two sets of calculations for polycrystalline models with textured and untextured surface layers were performed. Conclusions on the surface texture effect on the stress and strain fields and surface roughening in the surface and in the bulk of the polycrystals were drawn.
织构表面层对多晶钛变形行为的影响
用数值方法研究了织构面层对表面改性钛的变形行为的影响。采用分步堆积的方法生成了考虑晶粒形貌的三维多晶模型。采用ABAQUS/Explicit有限元软件对动态边值问题进行数值求解,建立了基于晶体塑性的本构模型,描述了单个晶粒的各向异性弹塑性行为。对具有纹理表面层和非纹理表面层的多晶模型进行了两组计算。得出了表面织构对多晶表面和本体的应力场、应变场和表面粗糙度的影响。用数值方法研究了织构面层对表面改性钛的变形行为的影响。采用分步堆积的方法生成了考虑晶粒形貌的三维多晶模型。采用ABAQUS/Explicit有限元软件对动态边值问题进行数值求解,建立了基于晶体塑性的本构模型,描述了单个晶粒的各向异性弹塑性行为。对具有纹理表面层和非纹理表面层的多晶模型进行了两组计算。得出了表面织构对多晶表面和本体的应力场、应变场和表面粗糙度的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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