Three dimensional (3D) microstructure-based modeling of interfacial decohesion in particle reinforced metal matrix composites

Williams, J.J. and Segurado Escudero, Javier and Llorca Martinez, Francisco Javier and Chawla, N. (2012). Three dimensional (3D) microstructure-based modeling of interfacial decohesion in particle reinforced metal matrix composites. "Materials Science and Engineering A", v. 557 ; pp. 113-118. ISSN 0921-5093. https://doi.org/10.1016/j.msea.2012.05.108.

Description

Title: Three dimensional (3D) microstructure-based modeling of interfacial decohesion in particle reinforced metal matrix composites
Author/s:
  • Williams, J.J.
  • Segurado Escudero, Javier
  • Llorca Martinez, Francisco Javier
  • Chawla, N.
Item Type: Article
Título de Revista/Publicación: Materials Science and Engineering A
Date: 15 November 2012
ISSN: 0921-5093
Volume: 557
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

Modeling and prediction of the overall elastic–plastic response and local damage mechanisms in heterogeneous materials, in particular particle reinforced composites, is a very complex problem. Microstructural complexities such as the inhomogeneous spatial distribution of particles, irregular morphology of the particles, and anisotropy in particle orientation after secondary processing, such as extrusion, significantly affect deformation behavior. We have studied the effect of particle/matrix interface debonding in SiC particle reinforced Al alloy matrix composites with (a) actual microstructure consisting of angular SiC particles and (b) idealized ellipsoidal SiC particles. Tensile deformation in SiC particle reinforced Al matrix composites was modeled using actual microstructures reconstructed from serial sectioning approach. Interfacial debonding was modeled using user-defined cohesive zone elements. Modeling with the actual microstructure (versus idealized ellipsoids) has a significant influence on: (a) localized stresses and strains in particle and matrix, and (b) far-field strain at which localized debonding takes place. The angular particles exhibited higher degree of load transfer and are more sensitive to interfacial debonding. Larger decreases in stress are observed in the angular particles, because of the flat surfaces, normal to the loading axis, which bear load. Furthermore, simplification of particle morphology may lead to erroneous results.

More information

Item ID: 15998
DC Identifier: http://oa.upm.es/15998/
OAI Identifier: oai:oa.upm.es:15998
DOI: 10.1016/j.msea.2012.05.108
Official URL: http://www.sciencedirect.com/science/article/pii/S092150931200891X
Deposited by: Memoria Investigacion
Deposited on: 28 Oct 2013 09:20
Last Modified: 01 Dec 2014 23:56
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