Simulation of the deformation of polycrystalline nanostructured Ti by computational homogenization

Segurado Escudero, Javier y 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.

Descripción

Título: Simulation of the deformation of polycrystalline nanostructured Ti by computational homogenization
Autor/es:
  • Segurado Escudero, Javier
  • Llorca Martinez, Francisco Javier
Tipo de Documento: Artículo
Título de Revista/Publicación: Computational materials science
Fecha: Agosto 2013
Volumen: 76
Materias:
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ciencia de los Materiales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 29081
Identificador DC: http://oa.upm.es/29081/
Identificador OAI: oai:oa.upm.es:29081
Identificador DOI: 10.1016/j.commatsci.2013.03.008
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0927025613001080
Depositado por: Memoria Investigacion
Depositado el: 02 Jul 2014 08:33
Ultima Modificación: 01 Sep 2015 22:56
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