| Check List for Greater Accuracy of Test Results for Charpy Impact Testing |
| Written by Administrator |
| Thursday, 05 February 2009 05:33 |
| Check List for Greater Accuracy of Test Results for Charpy Impact Testing  One of the most common tests of the physical characteristics of metals is the notched Charpy impact test as specified by ASTM E23 Standard Test Method for Notched Bar Impact Testing of Metallic Materials. In simple terms the test places a specimen, horizontally, at the center of a set of support anvils and a striker on a pendulum then strikes, and breaks, the specimen. The energy absorbed by the specimen in the breaking process is known as the breaking energy and can be converted into an indication of a materials impact resistance using such units as foot-pounds or joules. While use of the data generated from a test for designing a part is not necessarily recommended, it still provides reasonable service as a quality control tool. For some materials, the results of these kinds of impact tests, when correlated with temperature variations and service experience, can help to accurately predict the likelihood of brittle fracture. Sample Preparation ASTM E23 allows for four types of Charpy specimen, namely un-notched, notched type A, notched type B or notched type C. The most common specimen is notched type A. Notching Specimens >> Sample Conditioning >> Equipment >> Calibration >> Test Procedure >> Interpretation Of Results >>  |
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