- Title
- Fatigue characterization of functionally graded ZA27 alloy syntactic foams
- Creator
- Movahedi, Nima; Orbulov, Imre Norbet; Kemény, Alexandra; Belova, Irina V.; Murch, Graeme E.; Fiedler, Thomas
- Relation
- Materials Science and Engineering A Vol. 798, no. 140255
- Publisher Link
- http://dx.doi.org/10.1016/j.msea.2020.140255
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2020
- Description
- In this study, the fatigue properties of functionally graded metal syntactic foams (FG-MSF) are investigated under cyclic loading. The functionally graded foams are produced by controlling the spatial distribution of weak expanded perlite and stronger activated carbon particles within a ZA27 alloy matrix. As a reference, uniform metal syntactic foams containing only expanded perlite particles are tested alongside the functionally graded foams. These uniform foams are referred to as expanded perlite metal syntactic foam (EP-MSF). All samples are fatigue tested at three load levels in a compressive-compressive mode. The fatigue limits are evaluated using the staircase method and show similar values for both uniform and functionally graded foams. The Wöhler curves at the failure criterion ecrit=2% indicate almost identical numbers of fatigue cycles for FG-MSF and EP-MSF. The analysis of the deformation mechanism showed that the weaker EP layer controls the deformation mode of FG-MSFs. Similar to EP-MSF, the samples deform in a brittle manner with the propagation of shear bands.
- Subject
- foam; fatigue; mechanical properties; casting
- Identifier
- http://hdl.handle.net/1959.13/1423351
- Identifier
- uon:37920
- Identifier
- ISSN:0921-5093
- Language
- eng
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