Dynamic Impact Induced Residential Stress and Deformation in Silicon Carbide Ceramics

Yuan Fei Gao; Zhao Xia Si; Li Juan Wang; Yong Hao Feng

doi:10.4028/www.scientific.net/AMR.1142.107

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1142Dynamic Impact Induced Residential Stress and...

Dynamic Impact Induced Residential Stress and Deformation in Silicon Carbide Ceramics

Abstract:

Silicon carbide ceramics with different grain sizes were tested at high strain rate using a small-scale gas gun with sharpened tungsten carbide projectiles impacting at a sub-ballistic velocity of 100 m/s. The resistance of ceramics to fracture was recorded by visual examination of the cracking on the impacted surface and the damage in the sub-surface region. The crack pattern and impact crater region size observed in silicon carbide specimens are generally due to their mechanical properties. Silicon carbide samples had good capacity to defeat the projectiles but the low toughness led to early failure. Raman SiC mapping was used to examine the residual stress and plastic deformation induced in each material. The silicon carbide samples showed different dynamic behaviours due to the extent of stress relaxation.

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Advanced Materials Research (Volume 1142)

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107-112

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https://doi.org/10.4028/www.scientific.net/AMR.1142.107

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Online since:

January 2017

Authors:

Yuan Fei Gao*, Zhao Xia Si, Li Juan Wang, Yong Hao Feng

Keywords:

Dynamic Impact, Plastic Deformation, Residential Stress, Silicon Carbide

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