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Data from recording microhardness testers

Published online by Cambridge University Press:  31 January 2011

W. Mason ,
P.F. Johnson  and
J.R. Varner
W. Mason
Affiliation:
New York State College of Ceramics, Alfred University, Alfred, New York 14802
P.F. Johnson
Affiliation:
New York State College of Ceramics, Alfred University, Alfred, New York 14802
J.R. Varner
Affiliation:
New York State College of Ceramics, Alfred University, Alfred, New York 14802
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Abstract

An apparatus was constructed that measured hardness under load. The instrument measured hardness using a strain-gauge load cell and a linear voltage displacement transducer. Loading rates were less than 1 μm/s. Results were similar to the results of other electronic hardness measurement devices, in that the hardness fell with increasing load. Glasses measured have Meyers indexes from 1.6 to 1.75, while polycrystalline materials showed much more complex behaviors. A model was formulated to explain the data for glasses based on expansion of shear planes.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 11 , November 1992 , pp. 3112 - 3119
Copyright
Copyright © Materials Research Society 1992

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