اختبار صدم شارپي
اختبار صدم شارپي Charpy impact test, ويعهد أيضاً باسم Charpy v-notch test, is a standardized high strain-rate test which determines the amount of energy absorbed by a material during fracture. This absorbed energy is a measure of a given material's toughness and acts as a tool to study temperature-dependent brittle-ductile transition. It is widely applied in industry, since it is easy to prepare and conduct and results can be obtained quickly and cheaply. But a major disadvantage is that all results are only comparative.
The test was developed in 1905 by a French scientist. It was pivotal in understanding the fracture problems of ships during the second World War. Today it is used in many industries for testing building and construction materials used in the construction of pressure vessels, bridges and to see how storms will affect materials used in building.
أبعاد العينة
According to ASTM A370, standard specimen for Charpy impact test is 10mm×10mm×55mm. Subsize specimen are: 10mm×7.5mm×55mm, 10mm×6.7mm×55mm, 10mm×5mm×55mm, 10mm×3.3mm×55mm, 10mm×2.5mm×55mm. Details of specimen as per ASTM A370 (Standard Test Method and Definitions for Mechanical Testing of Steel Products).
هامش
- ^ Meyers and Chawla. Mechanical Behaviors of Materials. Prentice Hall, Inc. (Pearson Education). (1999).
- ^ Jacobs and Kilduff. Engineering Materials Technology. Pearson Prentice Hall. 5th Ed. 153-155 (2005).
انظر أيضاً
- Izod impact strength test
- Ductility
- Brittle
- Impact force
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