ASTM E2248, ASTM E2298 Detail Charpy Impact Tests
June 13, 2009 // Published as a news service by IHS
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ASTM International Committee E28 on Mechanical Testing approved ASTM E2248 Test Method for Impact Testing of Miniaturized Charpy V-Notch Specimens and ASTM E2298 Test Method for Instrumented Impact Testing of Metallic Materials.
"Conventional noninstrumented Charpy tests give useful comparative information but generally do not offer any detailed insight into the failure mechanisms or provide quantifiable material properties," said Enrico Lucon, senior researcher, Institute of Nuclear Material Science at the Belgian Nuclear Research Center.
"Particularly for structural integrity evaluations, using instrumented Charpy impact test data can improve the understanding of failure mechanisms at high loading rates," said Lucon. "On the other hand, in the case of thin-walled structures or for optimizing material consumption, miniature Charpy specimens may represent an attractive option."
Lucon said instrumenting the machine striker to measure and record the force on the notched sample during impact, as described in ASTM E2298, gives a clearer picture of the events occurring, providing additional insight into the behavior of material under impact loading.
Testing procedures described in ASTM E2248 will be helpful for users who need to reduce the size of Charpy specimens either because the investigated component is thin or because the available material is limited in quantity.
Source: ASTM International.