Dynamic-compression mechanical properties and energy-absorption capability of fly-ash cenospheres-reinforced 1199Al-matrix composite foam

Zhang Bo-yi; Wang Wei; Wu Gao-hui

doi:10.11883/1001-1455(2014)01-0028-07

Volume 34 Issue 1

Mar. 2014

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Zhang Bo-yi, Wang Wei, Wu Gao-hui. Dynamic-compression mechanical properties and energy-absorption capability of fly-ash cenospheres-reinforced 1199Al-matrix composite foam[J]. Explosion And Shock Waves, 2014, 34(1): 28-34. doi: 10.11883/1001-1455(2014)01-0028-07

Citation:

Zhang Bo-yi, Wang Wei, Wu Gao-hui. Dynamic-compression mechanical properties and energy-absorption capability of fly-ash cenospheres-reinforced 1199Al-matrix composite foam[J]. Explosion And Shock Waves, 2014, 34(1): 28-34. doi: 10.11883/1001-1455(2014)01-0028-07

Citation:

Zhang Bo-yi, Wang Wei, Wu Gao-hui. Dynamic-compression mechanical properties and energy-absorption capability of fly-ash cenospheres-reinforced 1199Al-matrix composite foam[J]. Explosion And Shock Waves, 2014, 34(1): 28-34. doi: 10.11883/1001-1455(2014)01-0028-07

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Dynamic-compression mechanical properties and energy-absorption capability of fly-ash cenospheres-reinforced 1199Al-matrix composite foam

doi: 10.11883/1001-1455(2014)01-0028-07

1.
School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China
2.
Center for Metal Matrix Composites Engineering Technology, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

Funds: Supported by the National Natural Science Foundation of China (51108141)

Received Date: 2012-08-27
Rev Recd Date: 2013-02-04
Publish Date: 2014-01-25

Abstract

Abstract

The fly-ash cenospheres-reinforced 1199Al-matrix composite foam was prepared by the pressure infiltration technique, in which containing the 80-μm-sized fly-ash cenospheres with the volume fraction of 0.4.Dynamic compression experiments were performed with a split Hopkinson pressure bar(SHPB)setup to investigate the dynamic compression properties and energy-absorption capability of the prepared composite foam in the strain rate range from 1 700s^-1 to 2 900s^-1.And the fractured surfaces of the compressed specimens were observed by a scanning electron microscopy.Moreover, the energy-absorption capability and the deformation mechanism of the prepared composite faom in dynamic compressions were compared with those of it in quasi-static compressions by an Instron 5569 tensile machine.The results show that the cenospheres-reinforced 1199Al-matrix composite foam is a strain-rate sensitive material.Its flow stress and plastic strain at the high strain rates are obviously higher than those under the quasi-static conditions.And the strain-rate hardening effect can more markedly influence the flow stress of the cenospheres-reinforced 1199Al-matrix composite foam than the strain-hardening effect.Furthermore, there are some differences between the quasi-static and dynamic compressive deformation mechanisms in the cenospheres-reinforced 1199Al-matrix composite foam.Under dynamic loadings, the fly-ash cenospheres in the cenospheres-reinforced 1199Al-matrix composite foam can be simultaneously compressed when the Al-matrix material is being filled, and there lies a good coordinate deformation capacity between the components.

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References

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