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Oral Poster Presentation
Influence of Sample Size on Dynamic Compression of Metal Syntactic FoamsWednesday (07.10.2020) 19:13 - 19:16
Influence of Sample Size on Dynamic Compression of Metal Syntactic Foams
Nima Movahedi1, Matej Vesenjak2, Lovre Krstulović-Opara3, Thomas Fiedler1
1. Centre for Mass and Thermal Transport in Engineering Materials, Discipline of Mechanical Engineering, University of Newcastle, Callaghan, NSW 2308, Australia
2. Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
3. Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, R. Boškovića 32, HR-21000 Split, Croatia
In this research, metal syntactic foams (MSFs) were manufactured using counter-gravity infiltration casting. Expanded perlite (EP) and Activated carbon (AC) particles were used as fillers inside a ZA27 alloy matrix. MSFs were manufactured in different aspect (height/diameter) ratios of 0.5, 1 and 1.5. The dynamic compression of these samples was carried out at 284 mm/s. Infrared thermography was employed to monitor the plastic deformation of samples. The results indicate a distinct influence of the particle type and sample size on the deformation mechanism and mechanical properties of MSFs. EP-MSFs mostly deformed in layer-by-layer mode whereas AC-MSFs experienced shear fracture. In EP-MSF, changing the aspect ratio altered the plateau stress of the samples. In AC-MSF, the aspect ratio affected the initial compressive strength without any significant change in plateau region.
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