極低炭素鋼の曲げ遷移挙動と変形速度との関係に及ぼす前ひずみの影響について

概要

論文の詳細を見る
The effect of prestrain on the relationship between non-ductile transition temperature and bending speed has been examined on a low carbon steel. In this experiment, the V-notched specimens of sharpy type were used and they were prestrained by bending at room temperature before the test. The amount of prestrain at the notch root was estimated by the micro-hardness method. The results obtained are summarized as follows : (1) In the case of a constant bending speed, the non-ductile transition temperature rises with increasing the amount of prestrain at room temperature. (2) The relationship between the non-ductile transition temperature T_B and the bending speed V is represented by the following equation, 1/T_B=a - b log V where a is dependent on the amount of prestrain and b is a constant. (3) It is assumed that the cleavage fracture at the bending test is caused by the same dislocation piled-up mechanism as that of the tensile test.
社団法人日本材料学会の論文
1978-05-15