Tolerancing Form Deviations for Rockwell Diamond Indenters

Published

September 1, 2002

Author(s)

Jun-Feng Song, Samuel R. Low III, Li Ma

Abstract

The spherical tip of Rockwell diamond indenters tends to be manufactured either a flat- or sharp-shaped surface because of the anisotropy property of the diamond. This can cause significant differences in the hardness readings. In order to control that effect, tolerances for form error deviations of Rockwell diamond indenters were specified in both ASTM and ISO standards. In this paper, experimental data on the effects of form deviations of Rockwell indenters are analyzed. Finite Element Analysis (FEA) is used to simulate the effect of form deviations on HRC readings. Theoretical analyses are verified by experimental results. Based on these results, as manufacturing and measurement techniques for Rockwell diamond indenters improve, it is suggested that a tighter tolerance be specified for the form deviations of Rockwell indenters used for calibrations of reference blocks.

Proceedings Title

IMEKO TC3/TC5/TC20 Joint International Measurement Conference

Conference Dates

September 24-26, 2002

Conference Location

Cekke, GE

Conference Title

International Measurement Confederation. IMEKO Congress

Pub Type

Conferences

Keywords

ASTM E18-2000, diamond indenter, FEA, finite element analysis, form deviation, HRC, ISO 6508-3:1999, Rockwell hardness

Citation

Song, J. , Low, S. and Ma, L. (2002), Tolerancing Form Deviations for Rockwell Diamond Indenters, IMEKO TC3/TC5/TC20 Joint International Measurement Conference, Cekke, GE (Accessed January 21, 2026)