Desogus, S.
, Germak, A.
, Ishida, H.
, Polzin, T.
, Yang, H.
, Song, J.
, Low, S.
and Pitchure, D.
(2017),
Establishing a World-Wide Unified Rockwell Hardness Scale Using Standard Diamond Indenters, Measurement
(Accessed December 30, 2024)
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Establishing a World-Wide Unified Rockwell Hardness Scale Using Standard Diamond Indenters
Published
Author(s)
S Desogus, A Germak, H Ishida, T Polzin, H Yang, , ,
Abstract
Recently developed microform measurement techniques have reduced the measurement uncertainties in the geometry of Rockwell diamond indenters. It is now possible to establish standard grade Rockwell diamond indenters characterized by high geometry uniformity, High hardness performance uniformity, interchangeability and reproducibility. By using the standard indenters under different national standard machines and a standardized testing cycle a worldwide unified Rockwell hardness scale could be established with metrological traceability, stability and reproducibility. Geometrical measurements and hardness tests in five laboratories have shown that tightly controlled indenter geometry can significantly improve the consistency of Rockwell C hardness (HRC) measurements. These results support the feasibility of establishing a worldwide unified HRC scale with an expanded uncertainty (k = 2) of approximately +0.2 HRC and without significant bias with respect to an ideal scale.Citation
Measurement
Pub Type
Journals
Keywords
diamond indenter, HRC, Rockwell hardness
Citation
Issues
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Created February 19, 2017