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Critical Load for Median Crack Initiation in Vickers Indentation of Glasses
Author(s) -
Ishikawa H.,
Shinkai N.
Publication year - 1982
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1982.tb10496.x
Subject(s) - materials science , indentation , fracture toughness , fractography , composite material , vickers hardness test , indentation hardness , fracture (geology) , critical load , deformation (meteorology) , microstructure , buckling
Critical load characteristics for the indentation‐induced median crack in ternary lead‐zinc‐borate and commercial silicate glasses were investigated. The critical load is directly proportional to the fracture toughness/Vickers microhardness term, supporting the Lawn‐Evans model; however, the magnitude of the load is considerably greater than that estiated from the model. The relation of critical load to deformation/fracture properties is discussed in terms of the stress field around the indent area and fractography.