Journal Article


Dermot Brabazon
R. Azari Khosroshahi
R. Taherzadeh Mousavian
N. Beigi Khosroshahi



mechanical engineering a356 rolling materials bimodal metal matrix composite mechanical properties ceramics

Mechanical properties of rolled A356 based composites reinforced by Cu-coated bimodal ceramic particles (2015)

Abstract Three kinds of A356 based composites reinforced with 3 wt.% Al2O3 (average particle size: 170 lm), 3wt.%SiC(average particle size:15lm), and 3 wt.% of mixed Al2O3–SiC powders (a novel composite with equal weights of reinforcement) were fabricated in this study via a two-step approach. This first process step was semi-solid stir casting, which was followed by rolling as the second process step. Electroless deposition of a copper coating onto the reinforcement was used to improve the wettability of the ceramic particles by the molten A356 alloy. From microstructural characterization, it was found that coarse alumina particles were most effective as obstacles for grain growth during solidification. The rolling process broke the otherwise present fine silicon platelets, which were mostly present around the Al2O3 particles. The rolling process was also found to cause fracture of silicon particles, improve the distribution of fine SiC particles, and eliminate porosity remaining after the first casting process step. Examination of the mechanical properties of the obtained composites revealed that samples which contained a bimodal ceramic reinforecment of fine SiC and coarse Al2O3 particles had the highest.
Collections Ireland -> Dublin City University -> Publication Type = Article
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> Subject = Engineering: Mechanical engineering
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: Advanced Processing Technology Research Centre (APTRC)
Ireland -> Dublin City University -> Subject = Engineering: Materials

Full list of authors on original publication

Dermot Brabazon, R. Azari Khosroshahi, R. Taherzadeh Mousavian, N. Beigi Khosroshahi

Experts in our system

Dermot Brabazon
Dublin City University
Total Publications: 162
R. Azari Khosroshahi
Dublin City University
Total Publications: 9
R. Taherzadeh Mousavian
Dublin City University
Total Publications: 12