What is it about?
An inter-laboratory study was conducted with more than 20 test laboratories to evaluate the community's ability to measure the critical dimensions of Charpy V-notch impact test specimen. The results were evaluated to determine the capability of the industry in meeting the dimensional requirements of ASTM E23.
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Why is it important?
The study revealed that a minority of the laboratories that participated could measure the critical dimensions of the V-notch in the Charpy specimen with sufficient precision to accurately identify conforming and non-conforming Charpy specimen to the dimensional requirements of ASTM E23.
Perspectives
This study highlighted the difficulty of accomplishing measurements to the level of accuracy needed to satisfy the ASTM E23 requirements. More attention is needed by test laboratories to ensure their measurement capabilities are sufficient for the test methods they are performing. Also, it is apparent that laboratories assume or take for granted a level of capability that may not be the reality in their laboratory. This information is also informative to the ASTM E28.07 subcommittee and will be used to guide future changes to the ASTM E23 test method.
David Conley
Huntington Ingalls Industries Inc
Read the Original
This page is a summary of: Investigation of Measurement Capability for Charpy V-Notch Specimens Using Typical Measurement Practices, Journal of Testing and Evaluation, June 2023, ASTM International,
DOI: 10.1520/jte20220047.
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