Stylus Technique for Direct Verification of Rockwell Diamond Indenters

Published

November 23, 1995

Author(s)

Jun-Feng Song, F Rudder, Theodore V. Vorburger, J Smith

Abstract

Based on a stylus technique, a microform calibration system was developed at NIST for the direct verification of Rockwell diamond indenters. The least-squares radius and profile deviations, cone angle and cone flank straightness, and the holder axis alignment error can be calibrated with traceability to fundamental measurements. The expanded measurement uncertainties are less than 1/10 of tolerance requirements of calibration-grade Rockwell diamond indenters specified in ASTM and ISO standards. The calibration requirements, instrument setup, calibration and check standards, calibration and uncertainty procedure, and the calibration results are described. Based on this calibration system, the use of the NIST standard-grade Rockwell diamond indenters is also suggested for the establishment of the reference-value scale for a metrology-based Rockwell hardness standard system and for the unification of Rockwell hardness standards.

Proceedings Title

Proceedings of the 9th International Symposium of Hardness Testing in Theory and Practice

Volume

1194

Conference Dates

November 23-24, 1995

Conference Location

Dusseldorf, 1, GE

Pub Type

Conferences

Citation

Song, J. , Rudder, F. , Vorburger, T. and Smith, J. (1995), Stylus Technique for Direct Verification of Rockwell Diamond Indenters, Proceedings of the 9th International Symposium of Hardness Testing in Theory and Practice, Dusseldorf, 1, GE (Accessed April 19, 2024)