MCE 230 - Impact Test - MCE 230 L Materials Science Charpy...

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MCE 230 –L Materials Science Charpy Impact Test Gagan Gururaj ID: 8526 Group 2 Date of Experiment: 5/10/03
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Aluminum and brass samples were tested using the Charpy pendulum impact test at room temperature and aluminum under different temperatures. Aluminum at 25 0 C was found to have an impact value of 28.6 Nm/cm 2 , at 100 0 C: 27.6 Nm/cm 2 , at 200 0 C: 21.2 Nm/cm 2 and at 300 0 C: 57.1 Nm/cm 2 . Introduction: The Charpy impact test measures the energy absorbed by the high strain rate fracture of a standard notched specimen. The specimen is broken by the impact of a heavy pendulum hammer that falls through a fixed distance to strike the specimen at a fixed velocity. The impact energy can be found with this experiment and with this information, the ductility of a material can be determined. Theory: a k = A k S o a k = notched bar impact value in Nm/cm 2 A k = notched bar impact work in Nm (A k is obtained by subtracting the friction loss from the read-off value indicated on the indicator unit.) S
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MCE 230 - Impact Test - MCE 230 L Materials Science Charpy...

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