Investigations on SI-Traceable Dynamic Calibration of Instrumented Charpy Strikers

Published

May 14, 2018

Author(s)

Akobuije D. Chijioke, Nicholas A. Vlajic, Enrico Lucon, Edward C. Mulhern

Abstract

In this Technical Note, we report on investigations toward an SI-traceable dynamic calibration of instrumented Charpy strikers, performed at NIST from January to December 2017. Although Charpy tests are few-millisecond-duration events in which dynamic phenomena are often clearly present, the force measurements from instrumented Charpy tests are predominantly obtained using static calibrations, which has long been recognized as a source of significant potential errors. We discuss a number of approaches to dynamic calibration, including methods that have previously been implemented at NIST (and elsewhere), and methods that are new in the sense that they are not presently commonly used or incorporated into standards. We describe exploratory tests of some of the new calibration approaches, the results of these tests, and how the information obtained is being applied to further work. A key objective of these investigations is that the calibration be traceable to the International System of Units.

Citation

Technical Note (NIST TN) - 1991

Report Number

1991

NIST Pub Series

Technical Note (NIST TN)

Pub Type

NIST Pubs

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DOI Link

Keywords

Dynamic calibration, instrumented Charpy striker, International System of Units (SI), SI traceability, static calibration

Mechanical properties

Citation

Chijioke, A. , Vlajic, N. , Lucon, E. and Mulhern, E. (2018), Investigations on SI-Traceable Dynamic Calibration of Instrumented Charpy Strikers, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.1991 (Accessed January 18, 2022)