Size effects in aluminium alloy castings

Autor:	Alan Needleman, J.R. Griffiths, A. Amine Benzerga, Kyung-Suk Kim, Cameron Davidson, M. Praud, Carlos H. Cáceres, Qigui Wang
Rok vydání:	2010
Předmět:	Materials science Polymers and Plastics Metallurgy Binary alloy Metals and Alloys Microstructure Electronic Optical and Magnetic Materials Dendrite (crystal) visual_art Ceramics and Composites Aluminium alloy visual_art.visual_art_medium Foundry Dislocation Grain boundary strengthening
Zdroj:	Acta Materialia. 58:3006-3013
ISSN:	1359-6454
DOI:	10.1016/j.actamat.2010.01.032
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::37df6e14c93116601fd8fe11e0335762 https://doi.org/10.1016/j.actamat.2010.01.032 Zobrazit plný text záznamu Full Text from ScienceDirect