Indenter flaw geometry and fracture toughness estimates for a glass-ceramic

Journal Article · Tue Oct 01 00:00:00 EDT 1985 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1985.tb11533.x· OSTI ID:6085839

Shetty, D K; Duckworth, W H; Rosenfield, A R

Shapes of cracks associated with Vickers indenter flaws in a glass-ceramic were assessed by stepwise polishing and measuring surface traces as a function of depth. The cracks were of the Palmqvist type even at 200-N indentation load. The load dependence of crack lengths and fracture toughness estimates were examined in terms of relations proposed for Palmqvist and half-penny cracks. Estimates based on the half-penny crack analogy were in closer agreement with bulk fracture toughness measurements despite the Palmqvist nature of the cracks.

• Research Organization: Battelle Columbus Laboratories, Columbus, Ohio
• OSTI ID: 6085839
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 68:10; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360603 -- Materials-- Properties
CERAMICS
CRACK PROPAGATION
CRACKS
DEFECTS
FRACTURE MECHANICS
FRACTURE PROPERTIES
GEOMETRY
GLASS
MATHEMATICS
MEASURING METHODS
MECHANICAL PROPERTIES
MECHANICS
POLISHING
STRESS INTENSITY FACTORS
SURFACE FINISHING
VICKERS HARDNESS