Journal
ACTA MATERIALIA
Volume 57, Issue 10, Pages 3003-3011Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2009.02.048
Keywords
Syntactic foam; Tomography; Microstructure; Compression; Deformation
Funding
- China Scholarship Fund
- EPSRC [GR/T26344/01]
- Engineering and Physical Sciences Research Council [GR/T26344/01, EP/F001452/1] Funding Source: researchfish
- EPSRC [EP/F001452/1] Funding Source: UKRI
Ask authors/readers for more resources
The structure of a fly ash/aluminum syntactic foam was characterized using X-ray microcomputed tomography. Microstructural features, such as size, morphology and distribution of fly ash microballoons, were quantitatively related to the deformation behavior using interrupted Compression tests. The syntactic foam was found to exhibit four distinct stages of deformation: (i) elastic; (ii) dispersed collapse of the fly ash microballoons; (iii) unification of the dispersed collapse region forming a band of densification, usually normal to the loading axis, via localized plasticity; and (iv) final densification. The tomographic observations show that deformation is initially controlled by the fragmentation and collapse of dispersed individual fly ash particles. After significant strain, sufficient microballoons have collapsed, localizing the stress and hence damage, and forming densification hands through severe plastic deformation of the aluminum matrix. A peak stress of 73 MPa and all energy absorption capacity of 27 MJ m(-3) at 47% strain were obtained. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available