Size effects in aluminium alloy castings

Wang, Q. G., Praud, M., Needleman, A., Kim, K. S., Griffiths, J. R., Davidson, C. J., Caceres, C. H. and Benzerga, A. A. (2010) Size effects in aluminium alloy castings. Acta Materialia, 58 8: 3006-3013. doi:10.1016/j.actamat.2010.01.032

Author Wang, Q. G.
Praud, M.
Needleman, A.
Kim, K. S.
Griffiths, J. R.
Davidson, C. J.
Caceres, C. H.
Benzerga, A. A.
Title Size effects in aluminium alloy castings
Journal name Acta Materialia   Check publisher's open access policy
ISSN 1359-6454
Publication date 2010-01-01
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.actamat.2010.01.032
Open Access Status Not yet assessed
Volume 58
Issue 8
Start page 3006
End page 3013
Total pages 8
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Subject 2503 Ceramics and Composites
2506 Metals and Alloys
2507 Polymers and Plastics
2504 Electronic, Optical and Magnetic Materials
Abstract A finding by Benzerga et al. (Acta Mater 2001; 49:3071) that the yield strength of Al-7Si-0.3Mg castings is smaller for castings with a fine secondary dendrite arm spacing (SDAS) than for those with a coarse SDAS is revisited. Previous experimental data for Al-Si-Mg castings are reviewed, and new experiments carried out, both on the original castings used in Benzerga et al. and on Al-Si binary alloy castings whose microstructures more closely conform to the theoretical model of Benzerga et al. The experimental results show that the inverse size effect reported by Benzerga et al. was a consequence of different heat-treatments applied to the original castings, rather than to any intrinsic size effect. The present results confirm that there is a negligibly small size effect in both heat-treatable (Al-Si-Mg) and non-heat-treatable (Al-Si) castings.
Keyword Dendrite arm spacing
Discrete dislocations
Hall Petch Parameters
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Engineering Publications
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