Developing definitions of conventional hardness tests for use by National Metrology Institutes

Determination and Uncertainty Propagation of Sensitivity Coefficients in Rockwell Hardness Measurements

“…A problem arises when trying to understand how different measurement parameters affect the outcome of the measurement itself [4], [13], [14]. Understanding these issues is of fundamental importance for the CCM Working Group on Hardness of Consultative Committee of Mass and Related Quantities of the CIPM (CCM-WGH) when establishing the international definitions to be applied by National Metrology Institutes (NMIs) [15].…”

Alignment Tilt and Force Transducer Creep Effects on Hardness in Conventional Hardness Tests

“…The research was carried out for the Rockwell C scale -the most popular of the 30 Rockwell scales defined by ASTM (ISO defines 15 of these) [5]. The Rockwell test is one step process in which hardness is obtained as a function of intender displacement according to EN ISO 6508-3.…”

Determination and Uncertainty Propagation of Sensitivity Coefficients in Rockwell Hardness Measurements

“…A problem arises when trying to understand how different measurement parameters affect the outcome of the measurement itself [4,13,14]. Understanding these issues is of fundamental importance for the CCM Working Group on Hardness of Consultative Committee of Mass and Related Quantities of the CIPM (CCM-WGH) when establishing the international definitions to be applied by National Metrology Institutes (NMIs) [15]. Most of the mathematical models defining hardness scales do not directly include factors (such as the speed of the indenter, the force, maximum displacement, thermal drift, etc.)…”