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).

Transcribed Image Text:

Test Impact energy (J) Temperature 0.30% 0.39% 1.01% 1.55% MnMn -100 -75 -50 -25 15 25 45 70 110 135 140 140 140 12 25 25 50 75 100 10 30 60 105 130 130 100 125 135 135 20 40 75 110 130 135 135 150 -1.55% Mn 1.01% Mn 0.30% Mn -+-0.30% Mn こ100 L ← 150 100 -50 50 100 150 Temperature (uC)