Crack initiation by indentation fatigue in lead alkali and soda-lime glass

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1997.tb03183.x· OSTI ID:554070

Banerjee, R ^[1]; Sarkan, B K ^[2]

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1. Central Glass and Ceramic Research Inst., Calcutta (India)
2. Indian Association for the Cultivation of Science, Calcutta (India)

An indentation technique using a conventional Vickers microhardness tester was used to evaluate fatigue properties of lead-alkali and soda-lime silica glasses. The specimens were indented repeatedly at the same point with subcritical loads until radial cracks were initiated. The number of cycles to initiate the cracks at different subcritical loads demonstrated typical fatigue curves for both glasses. The uniqueness of the experiment was that the diagonal lengths of the deformed cavity were observed to increase with the number of cycles. This increase of the deformed cavity for a certain number of cycles prior to the visibility of crack initiation was analyzed, correlating the elastic-plastic phenomenon and the accumulation of the residual stress in each cycle.

• Sponsoring Organization: USDOE
• OSTI ID: 554070
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 10 Vol. 80; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALI METALS
CALCIUM CARBONATES
CRACK PROPAGATION
CRACKS
DEFORMATION
FATIGUE
GLASS
LEAD
RESIDUAL STRESSES
SILICA
SODIUM CARBONATES
SURFACES
VICKERS HARDNESS