ESTIMATION OF UNCERTAINTY IN ROCKWELL HARDNESS DIAMOND CONE INDENTERS
Jorge Trota Filho, Renato Reis Machado, Sérgio Pinheiro de Oliveira, Cláudio Afonso Koch, Islei Domingues da Silva
Abstract:
This work aims to validate the creation of a relationship between the direct and indirect calibrations of Rockwell C hardness diamond cone indenters. The resulting modelling allows the prediction of the indenters behaviour based on direct calibration. The uncertainty of indenters was obtained from the graph of uncertainty related to the Primary Hardness Standard Machine as a function of the uncertainty related to the Primary System for Calibration of Indenters. For mounting the experimental set-up it was necessary to use a lot of indenters, and their characteristics helped to model the behaviour of any other indenters. The majority of the results showed a good agreement between the uncertainty obtained from the indirect calibration and the uncertainty from the graphs used to create the mentioned model.
Keywords:
Rockwell indenter, Rockwell hardness, measurement uncertainty
Download:
IMEKO-WC-2009-TC5-551.pdf
DOI:
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Event details
Event name:
XIX IMEKO World Congress
Title:

Fundamental and Applied Metrology

Place:
Lisbon, PORTUGAL
Time:
06 September 2009 - 11 September 2009
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