Fracture damage in borosilicate glass during microcutting tests

Journal Article · Mon Jan 15 04:00:00 EST 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(95)00503-X· OSTI ID:186791

Tanikella, B V; Scattergood, R O ^[1]

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1. North Carolina State Univ., Raleigh, NC (United States). Dept. of Materials Science and Engineering

When the stress field due to an applied load on a brittle material like glass is localized in spatial extent, there will be a transition from plastic flow to fracture at a critical load. Previous studies of the crack-initiation thresholds have relied primarily upon static indentation tests to simulate the localized loading conditions. Critical loads for crack initiation were detected using either acoustic emission or in situ optical microscopy with transparent materials. In a recent study, Tanikella and Scattergood developed a controlled loading system with an acoustic emission sensor that demonstrated a one-to-one correspondence between crack initiation and acoustic signal thresholds during static Vickers indentation of soda-lime glass. The purpose of the work reported here was to examine the fracture threshold response for a borosilicate glass during controlled microcutting (scratching) with a Vickers indentor and to compare the results to static Vickers indentation. The microcutting behavior is important because it plays a fundamental role in determining the subsurface fracture damage produced in manufacturing processes such as polishing and grinding.

• DOE Contract Number: FG05-84ER45115
• OSTI ID: 186791
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 2 Vol. 34; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACOUSTIC EMISSION TESTING
ANNEALING
BOROSILICATE GLASS
BRITTLENESS
CRACKS
CUTTING
DIAMONDS
FRACTURE PROPERTIES
PLASTICITY
RESIDUAL STRESSES
SAMPLE PREPARATION