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ASTM E23-12b
Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
25 стр.
Заменен
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Разработчик:
Зарубежные/ASTM
ICS:
77.040.10 Mechanical testing of metals / Механические испытания металлов
Сборник (ASTM):
03.01 Metals -- Mechanical Testing; Elevated and Low-Temperature Tests; Metallography / Металлы - Механические испытания, Испытания при высоких и низких температурах, Металлография
Тематика:
Physical & Mechanical Testing
Описание
Значение и использование

These test methods of impact testing relate specifically to the behavior of metal when subjected to a single application of a force resulting in multi-axial stresses associated with a notch, coupled with high rates of loading and in some cases with high or low temperatures. For some materials and temperatures the results of impact tests on notched specimens, when correlated with service experience, have been found to predict the likelihood of brittle fracture accurately. Further information on significance appears in Appendix X1.

Область применения

1.1 These test methods describe notched-bar impact testing of metallic materials by the Charpy (simple-beam) test and the Izod (cantilever-beam) test. They give the requirements for: test specimens, test procedures, test reports, test machines (see Annex A1) verifying Charpy impact machines (see Annex A2), optional test specimen configurations (see Annex A3), designation of test specimen orientation (see Terminology E1823), and determining the percent of shear fracture on the surface of broken impact specimens (see Annex A4). In addition, information is provided on the significance of notched-bar impact testing (see Appendix X1), and methods of measuring the center of strike (see Appendix X2).

1.2 These test methods do not address the problems associated with impact testing at temperatures below 196 °C (77 K).

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3.1 ExceptionSection 8 and Annex A4 provide inch-pound units for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 5.

Ключевые слова:
Charpy test; fracture appearance; Izod test; impact test; notched specimens; pendulum machine