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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/197844
- Deformation mechanisms of MMCs under indentation
- Pramanik, A.; Zhang, L. C.; Arsecularatne, J. A.
- This paper investigates the deformation mechanisms of MMCs subjected to micro-indentation by a spherical indenter using a three-dimensional finite element modeling. It was found that deformation behavior, hardness and work hardening of MMCs were highly dependant on the location of indentation relative to particles, volume percentage of the particle, and the size ratio of indenter to particle. The hardness of an MMC varied in a complex manner depending on the restriction on the matrix flow by reinforced particles and work hardening of the matrix material. Hardness increased with the increase of volume percentage of reinforced particles and decrease of the size ratio of indenter to particle. Matrix flow due to indentation was highly non-uniform which generated an inhomogeneous strain filed in an MMC. These pose a question that the conventional definition of micro-hardness is not very appropriate for characterizing MMCs.
- Publication type
- Journal article
- Composites Science and Technology, Vol. 68, no. 6 (May 2008), pp. 1304-1312
- Publication year
- FOR Code(s)
- 0912 Materials Engineering
- Composite; Deformation; Finite element analysis; Finite element method; Hardness testing; Indentation; Mathematical model; Matrix; Matrix flow; Metallic matrix composites; Plastic deformation; Residual stresses; Strain; Strain hardening; Stress; Testing
- Publisher URL
- Copyright © 2007 Elsevier Ltd. All rights reserved.
- Peer reviewed