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Mechanical behaviour of silicon carbide under static and dynamic compression

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journal contribution
posted on 31.05.2018, 10:28 by Dezhou Zhang, Liguo ZhaoLiguo Zhao, Anish RoyAnish Roy
This paper compared the mechanical behaviour of 6H SiC under quasi-static and dynamic compression. Rectangle specimens with a dimension of 3×3×6 mm3 were used for quasi-static compression tests under three different loading rates (i.e., 10-5/s, 10-4/s and 10-3/s). Stress-strain response showed purely brittle behavior of the material which was further confirmed by SEM/TEM examinations of fractured fragments. For dynamic compression, split Hopkinson pressure bar (SHPB) tests were carried out for cubic specimens with a dimension of 6×6×4 mm3. Stress-strain curves confirmed the occurrence of plastic deformation under dynamic compression, and dislocations were identified from TEM studies of fractured pieces. Furthermore, JH2 model was used to simulate SHPB tests, with parameters calibrated against the experimental results. The model was subsequently used to predict strength and plasticity-related damage under various dynamic loading conditions. This study concluded that, under high loading rate, SiC can deform plastically as evidenced by the development of non-linear stressstrain response and also the evolution of dislocations. These findings can be explored to control the brittle behaviour of SiC and benefit end users in relevant industries.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Journal of Engineering Materials and Technology, Transactions of the ASME

Citation

ZHANG, D., ZHAO, L. and ROY, A., 2018. Mechanical behaviour of silicon carbide under static and dynamic compression. Journal of Engineering Materials and Technology, 141(1): 011007.

Publisher

© American Society of Mechanical Engineers

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/

Acceptance date

12/05/2018

Publication date

2018-07-18

Notes

This paper was accepted for publication in the journal Journal of Engineering Materials and Technology and the definitive published version is available at http://doi.org/10.1115/1.4040591.

ISSN

0094-4289

Language

en