Abstract
The sequence of radial and median crack formation during Vickers indentations on soda-lime-silica glass with different surface treatments has been investigated. For chemically-toughened soda-lime-silica glass no radial/median cracks were observed around indentations at loads high enough to induce cracks in annealed glasses, even though the thickness of the compressive stress layer was much smaller than the size of the deformed zone. This indicates that embryonic crack initiations at the surface are essential for the development of both median and radial cracks. The crack initiation was discussed from the point of view of the Perrott stress field model and SEM studies.
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Haranoh, T., Ishikawa, H., Shinkai, N. et al. Crack evolution in Vickers indentation for soda-lime-silica glass. J Mater Sci 17, 1493–1500 (1982). https://doi.org/10.1007/BF00752265
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DOI: https://doi.org/10.1007/BF00752265