The following data were obtained from a series of Charpy impact tests performed on four steels, each having a different manganese content. Plot the data and determine
(a) the transition temperature of each (defined by the mean of the absorbed energies in the ductile and brittle regions); and
(b) the transition temperature of each (defined as the temperature that provides 50 J of absorbed energy)
Test Temperature (°C) | Impact Energy (J) | |||
0.30% Mn | 0.39% Mn | 1.01% Mn | 1.55% Mn | |
-100 | 2 | 5 | 5 | 15 |
-75 | 2 | 5 | 7 | 25 |
-50 | 2 | 12 | 20 | 45 |
-25 | 10 | 25 | 40 | 70 |
0 | 30 | 55 | 75 | 110 |
25 | 60 | 100 | 110 | 135 |
50 | 105 | 125 | 130 | 140 |
75 | 130 | 135 | 135 | 140 |
100 | 130 | 135 | 135 | 140 |
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