Hardness Testing
Indirect Verification
Indirect verification, as specified by the test standards, involves assessing two aspects of the hardness machine: (1) its repeatability, or how well the hardness machine can repeatedly measure the same...
Indirect Verification
Indirect verification, as specified by the test standards, involves assessing two aspects of the hardness machine: (1) its repeatability, or how well the hardness machine can repeatedly measure the same...
Correcting Measurement Biases
For Rockwell hardness machines that have successfully passed both direct and indirect verifications, there will continue to be some level of measurement error or bias with respect to the reference...
Correcting Measurement Biases
For Rockwell hardness machines that have successfully passed both direct and indirect verifications, there will continue to be some level of measurement error or bias with respect to the reference...
Monitoring Test Machine Performance
6.1 Reproducibility In the previous discussion of the repeatability of a hardness machine in 5.2.1, it was imagined that a small number of Rockwell measurements were made on a perfectly...
Monitoring Test Machine Performance
6.1 Reproducibility In the previous discussion of the repeatability of a hardness machine in 5.2.1, it was imagined that a small number of Rockwell measurements were made on a perfectly...
Daily Verification
The test method standards state procedures for conducting a daily verification of the Rockwell hardness machine. The intent of the daily verification is for the user to monitor the reproducibility...
Daily Verification
The test method standards state procedures for conducting a daily verification of the Rockwell hardness machine. The intent of the daily verification is for the user to monitor the reproducibility...
Reducing Measurement Differences and Errors
Consider two Rockwell hardness machines, perhaps a supplier’s machine and a customer’s machine. Suppose both machines pass indirect verifications. Will the two machines then measure the same hardness value for...
Reducing Measurement Differences and Errors
Consider two Rockwell hardness machines, perhaps a supplier’s machine and a customer’s machine. Suppose both machines pass indirect verifications. Will the two machines then measure the same hardness value for...
Reduce Machine Component Operating Errors
It is generally not possible to make good Rockwell hardness measurements with a poorly operating machine. The initial consideration should be to use a Rockwell machine capable of measuring to...
Reduce Machine Component Operating Errors
It is generally not possible to make good Rockwell hardness measurements with a poorly operating machine. The initial consideration should be to use a Rockwell machine capable of measuring to...