Mechanical, Thermal, and Chemical Properties - Cracking and the Indentation Size Effect for Knoop Hardness of Glasses
George D. Quinn, P A. Green, K Xu
The influence of cracking upon apparent Knoop hardness was investigated for five glasses. The Knoop hardnesses decreased with increasing load in accordance with the classic indentation size effect (ISE). Cracking commenced at moderate loads and, in three of the five glasses studied, altered the indentation sizes and the ISE trends. Cracked indentations were as much as 10 m longer than uncracked indentations made under indentical conditions. Cracking around the indentation enabled the indenter to penetrate deeper into the material and larger indentations were produced.
, Green, P.
and Xu, K.
Mechanical, Thermal, and Chemical Properties - Cracking and the Indentation Size Effect for Knoop Hardness of Glasses, Journal of the American Ceramic Society
(Accessed December 5, 2023)