Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.actamat.2007.05.032
Title: Properties and deformation behaviour of Mg-Y2O3 nanocomposites
Authors: Goh, C.S.
Wei, J.
Lee, L.C.
Gupta, M. 
Keywords: Magnesium
Nanocomposite
Slip
Y2O3
Issue Date: Sep-2007
Source: Goh, C.S., Wei, J., Lee, L.C., Gupta, M. (2007-09). Properties and deformation behaviour of Mg-Y2O3 nanocomposites. Acta Materialia 55 (15) : 5115-5121. ScholarBank@NUS Repository. https://doi.org/10.1016/j.actamat.2007.05.032
Abstract: Composites of Mg reinforced with 0.5, 1 and 2 vol.% of nanosized Y2O3 particles were fabricated using the disintegrated melt deposition technique. The nanocomposites were found to be thermally more stable than monolithic pure Mg and the tensile yield strength increased by 29% with the addition of 2 vol.% of Y2O3 nanoparticles. The yield strength improvement was attributed to (i) load-bearing effects due to the presence of nanosized reinforcements, (ii) generation of geometrically necessary dislocations to accommodate CTE mismatch between the matrix and the particles, (iii) Orowan strengthening, and (iv) the Hall-Petch effect due to grain size refinement. Basal slip and twinning were found to be the main deformation modes during extrusion, while non-basal slip was activated during tensile deformation at room temperature due to the alignment of basal planes along the tensile axis after extrusion. © 2007 Acta Materialia Inc.
Source Title: Acta Materialia
URI: http://scholarbank.nus.edu.sg/handle/10635/85580
ISSN: 13596454
DOI: 10.1016/j.actamat.2007.05.032
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