Simulation of the deformation of polycrystalline nanostructured Ti by computational homogenization

Segurado Escudero, Javier and Llorca Martinez, Francisco Javier (2013). Simulation of the deformation of polycrystalline nanostructured Ti by computational homogenization. "Computational materials science", v. 76 ; pp. 3-11. ISSN 0927-0256. https://doi.org/10.1016/j.commatsci.2013.03.008.

Description

Title: Simulation of the deformation of polycrystalline nanostructured Ti by computational homogenization
Author/s:
  • Segurado Escudero, Javier
  • Llorca Martinez, Francisco Javier
Item Type: Article
Título de Revista/Publicación: Computational materials science
Date: August 2013
Volume: 76
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Computational homogenization by means of the finite element analysis of a representative volume element of the microstructure is used to simulate the deformation of nanostructured Ti. The behavior of each grain is taken into account using a single crystal elasto-viscoplastic model which includes the microscopic mechanisms of plastic deformation by slip along basal, prismatic and pyramidal systems. Two different representations of the polycrystal were used. Each grain was modeled with one cubic finite element in the first one while many cubic elements were used to represent each grain in the second one, leading to a model which includes the effect of grain shape and size in a limited number of grains due to the computational cost. Both representations were used to simulate the tensile deformation of nanostructured Ti processed by ECAP-C as well as the drawing process of nanostructured Ti billets. It was found that the first representation based in one finite element per grain led to a stiffer response in tension and was not able to predict the texture evolution during drawing because the strain gradient within each grain could not be captured. On the contrary, the second representation of the polycrystal microstructure with many finite elements per grain was able to predict accurately the deformation of nanostructured Ti.

More information

Item ID: 29081
DC Identifier: http://oa.upm.es/29081/
OAI Identifier: oai:oa.upm.es:29081
DOI: 10.1016/j.commatsci.2013.03.008
Official URL: http://www.sciencedirect.com/science/article/pii/S0927025613001080
Deposited by: Memoria Investigacion
Deposited on: 02 Jul 2014 08:33
Last Modified: 01 Sep 2015 22:56
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