Indentation techniques are largely used nowadays for characterizing the intrinsic mechanical properties of brittle materials. A cyclic indentation tests have been carried out on soda lime glass and borosilicate glass using an instrumented indentation apparatus. Repeated post-threshold Vickers indentations were made using various peak loads. The hardness, elastic modulus and fracture toughness of the two glasses were evaluated using the consecutive load-displacement curves. Their properties of were compared and discussed.
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