Assessment of Different Approaches for Measuring Shear Fracture Appearance in Charpy Tests

Journal Article · 21 March 2023 · Journal of Testing and Evaluation

DOI: https://doi.org/10.1520/jte20220691 · OSTI ID:1972570

Lucon, Enrico  ^[1]; Martin, May L.  ^[1]; Calvo, Brooke L. ^[2]; Chen, Xiang  ^[3]; Sokolov, Mikhail A.  ^[3]

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1. National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
2. University of Memphis, TN (United States)
3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In this work, different approaches for establishing shear fracture appearance (SFA) on tested Charpy specimens were assessed and compared, namely (in order of increasing expected accuracy) estimates based on characteristic forces from instrumented Charpy tests, optical measurements using image analysis software, and measurements performed with the aid of a scanning electron microscope. Comparisons between different SFA values for 129 instrumented Charpy tests currently included in the National Institute of Standards and Technology database allowed us to establish the relationships between the different available approaches and formulate recommendations for the revision of the standards ASTM E2298-18, Standard Test Method for Instrumented Impact Testing of Metallic Materials, and ISO 14556:2015, Metallic Materials — Charpy V-Notch Pendulum Impact Test — Instrumented Test Method, which currently provide four empirical correlations that can be used to estimate SFA.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1972570
• Journal Information: Journal of Testing and Evaluation, Journal Name: Journal of Testing and Evaluation Journal Issue: 5 Vol. 51; ISSN 0090-3973
• Publisher: ASTM InternationalCopyright Statement
• Country of Publication: United States
• Language: English