This paper compared the mechanical behavior 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 scanning electron microscopy (SEM)/transmission electron microscopy (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, silicon carbide (SiC) can deform plastically as evidenced by the development of nonlinear stress–strain response and also the evolution of dislocations. These findings can be explored to control the brittle behavior of SiC and benefit end users in relevant industries.
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January 2019
Research-Article
Mechanical Behavior of Silicon Carbide Under Static and Dynamic Compression
D. Zhang,
D. Zhang
Wolfson School of Mechanical,
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
Search for other works by this author on:
L. G. Zhao,
L. G. Zhao
Wolfson School of Mechanical,
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: L.Zhao@Lboro.ac.uk
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: L.Zhao@Lboro.ac.uk
Search for other works by this author on:
A. Roy
A. Roy
Wolfson School of Mechanical,
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
Search for other works by this author on:
D. Zhang
Wolfson School of Mechanical,
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
L. G. Zhao
Wolfson School of Mechanical,
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: L.Zhao@Lboro.ac.uk
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: L.Zhao@Lboro.ac.uk
A. Roy
Wolfson School of Mechanical,
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
Electrical and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
1Corresponding author.
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received February 20, 2018; final manuscript received May 16, 2018; published online July 18, 2018. Assoc. Editor: Vikas Tomar.
J. Eng. Mater. Technol. Jan 2019, 141(1): 011007 (10 pages)
Published Online: July 18, 2018
Article history
Received:
February 20, 2018
Revised:
May 16, 2018
Citation
Zhang, D., Zhao, L. G., and Roy, A. (July 18, 2018). "Mechanical Behavior of Silicon Carbide Under Static and Dynamic Compression." ASME. J. Eng. Mater. Technol. January 2019; 141(1): 011007. https://doi.org/10.1115/1.4040591
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