Use of the Indentation Size Effect on Microhardness for Materials Characterization

PM Sargent

doi:10.1520/STP32956S

SYMPOSIA PAPER Published: 01 January 1985

STP32956S

Use of the Indentation Size Effect on Microhardness for Materials Characterization

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This paper describes several different physicochemical mechanisms that produce an indentation size effect on microhardness. The mechanisms are illustrated with reference to published data. A simple quantitative model for surface layer effects is presented, and its relevance to chemomechanical effects on ceramics is discussed.

A well-behaved empirical function describing some indentation size effects is introduced, and its advantages are discussed. It is used in a new method of graphically presenting microhardness data which is presented here for the first time. This “error-ellipsoid” diagram not only is visually compact and statistically rigorous but is based on a new physically meaningful parameter, the “10-μm hardness.”

Author Information

Sargent, PM

University of Cambridge, Cambridge, England

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Details

Developed by Committee: E04

Pages: 160–174

DOI: 10.1520/STP32956S

ISBN-EB: 978-0-8031-4951-9

ISBN-13: 978-0-8031-0441-9

Use of the Indentation Size Effect on Microhardness for Materials Characterization

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