Indenter Elastic Modulus and Hertzian Ring Crack Initiation

Conference · Wed Dec 31 23:00:00 EST 2008

OSTI ID:1049167

Strong, Kevin T ^[1]; Wereszczak, Andrew A ^[1]; Daloz, William L ^[1]

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1. ORNL

Hertzian ring crack initiation was studied in several brittle materials using spherical indenters made from different materials. Target materials included silicon carbide, silicon nitride, and borosilicate glass. Indenter materials included glass, zirconia, steel, silicon nitride, alumina, and tungsten carbide. Decreasing the elastic modulus of the indenter against every one of the target materials resulted in the target material exhibiting ring crack initiation at lower forces. The trend is consistent and conclusive. This response is described in regards to the Poisson's mismatch between indenter and target and the associated friction effects that it produces.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: ORNL work for others
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1049167
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BOROSILICATE GLASS
CERAMICS
FRICTION
GLASS
SILICON CARBIDES
SILICON NITRIDES
TARGETS
TUNGSTEN CARBIDES