The following tabulated data were gathered from a series of Charpy impact tests on a commercial low-carbon steel alloy.
Temperature (°C) | Impact Energy (J) |
50 | 76 |
40 | 76 |
30 | 71 |
20 | 58 |
10 | 38 |
0 | 23 |
-10 | 14 |
-20 | 9 |
-30 | 5 |
-40 | 1.5 |
(a) Plot the data as impact energy versus temperature.
(b) Determine a ductile-to-brittle transition temperature as the temperature corresponding to the average of the maximum and minimum impact energies.
(c) Determine a ductile-to-brittle transition temperature as the temperature at which the impact energy is 20 J.
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