ESTABLISHMENT OF A MARTENS HARDNESS CALIBRATION SERVICE

摘要

As part of the UK.s National Measurement System Mass Programme, and as a result of industrial demand, it was decided to establish a Martens hardness calibration service. This report describes the basis of Martens hardness measurement, work done to determine the ability of NPL.s 1,5 kN hardness machine to measure Martens hardness, the process of establishing the calibration service, and the setting up of instrumented indentation hardness tests.