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Title: Calibration Uncertainties For Microform Of Rockwell Hardness Injlenters
Author: Fred F. Rudder, Jr., Jun-Feng Song
Source: 1995 Measurement Science Conference
Year Published: 1995
Abstract: A microform calibration procedure has been developed at NIST to certify geometric conformity of Rockwell C hardness indenters. The interest in microform calibration is to unify national and international comparisons of hardness tests. Using accepted practice, we have determined the measurement uncertainties of each step of the calibration procedure. The measurement uncertainties are expressed and combined using IS0 and NIST guidelines. These guidelines unify the reporting of the calibration uncertainty for national and international comparisons. The problem is described, necessary terminology is explained, and an example is presented using measurement results.


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