کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1475790 | 991130 | 2011 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: High strain rate indentation-induced deformation in alumina ceramics measured by Cr3+ fluorescence mapping High strain rate indentation-induced deformation in alumina ceramics measured by Cr3+ fluorescence mapping](/preview/png/1475790.png)
Alumina materials with a range of grain sizes and purities were subjected to small-scale dynamic impact by sharpened tungsten carbide projectiles at sub-ballistic velocities. The resistance of the materials to fracture was recorded by visual examination of the cracking on the impacted surface and the damage in the subsurface region. The residual stress and plastic deformation induced in each material were examined using Cr3+ fluorescence mapping. A modified Hertzian indentation model of the stress state in the material with the addition of a blister field representing the stress induced by the presence of the subsurface plastic zone was found accurately describe the observed cracks beneath the surface of the material, as well as the radial cracks on the surface.
Journal: Journal of the European Ceramic Society - Volume 31, Issue 13, November 2011, Pages 2177–2187