Dynamic compressive behavior of a 45 vol.% SiCp/2024Al composite at various high strain rates

Issue		DYMAT 2009 Volume 1, 2009 DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading


Page(s)		155 - 161
Section		Experimental Techniques
DOI		http://dx.doi.org/10.1051/dymat/2009021
Published online		15 September 2009

DYMAT 2009 (2009) 155-161
DOI: 10.1051/dymat/2009021

Dynamic compressive behavior of a 45 vol.% SiCp/2024Al composite at various high strain rates

Y. Zhu, B. Pang, B. Gai, L. Wang and W. Zhang

School of Astronautics, Harbin Institute of Technology, 150001 Harbin, China

Published online: 15 September 2009

Abstract
The dynamic compressive behavior of a 45 vol.% SiCp/2024Al composite with different specimen sizes over the strain rate range from 1000 to 8500 s⁻¹ was tested by split Hopkinson pressure bar (SHPB). The microscopic structure was observed by scanning electron microscopy. The results show that the specimen's macroscopic damage and fracture is relevant to its size and strain rate. The SiCp/2024Al composite exhibits little strain-rate sensitivity when the specimen is not broken. And the composite's strength is weakened by adiabatic heat and cumulative damage under high strain rate compression. The composite's ductility is better at higher strain rate.

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