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On the Notch Sensitivity of Mild Steel (The 2nd. Report)
Abstract
It is familiar that stress concentration and triaxiality have great influence upon the transition temperature of notch sensitivity of mild steel. So I performed impact tests of various notched specimens, and studied the influence of the followings : i.e. (1) Notch radius, and Thickness of specimens, (2) Notch angle, and Notch depth, (3) Side notches, A 13mm. thickness rimmed steel was used for the tests.Using the theory of the notch sensitivity of mild steel stated in the 1st. report, I obtained curves of mean energy transition temperatures vs. stress concentration and triaxiality matching very well with the experimental results. And also I verified that there is a certain relation between the absorbed energy at 0°C and the temperature on the 2.6kg-m/cm2 (15Ft-Lb energy of the standard specimen) absorbed energy level.Some detailed discussion about absorbed energy will be left to the next report (the 3rd. report).
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