NIST Microform Calibration - How Does It Benefit U.S. Industry?
Jun-Feng Song, Theodore V. Vorburger
In microform metrology, complex 3-D surface features in the micrometer range must be quantified for their space and size including dimensions, curves, angles, profile deviations, and alignment errors, as well as surface roughness with measurement uncertainties compatible with tolerance requirements. NIST started microform calibrations for Rockwell diamond indenters in 1994. The calibration and check standards, calibration procedures, and calibration uncertainties are introduced. NIST calibrated Rockwell indenters have been used in a US national primary Rockwell hardness testing machine, and one of these is planned for use as a common Rockwell indenter in an international round robin comparison.
American Society for Precision Engineering, Annual Meeting | 13th | | ASPE
October 25-30, 1998
Proceedings of the American Society for Precision Engineering