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結晶粒子の大きさの影響について

概要

論文の詳細を見る
The effect of grain size on the relation between non-ductile transition behaviour and bending speed of a low carbon steel has been examined with Charpy type specimens (V-notch). The principal results obtained are summarized as follows : (1) Under a constant bending speed, the relation between non-ductile transition temperature T_B and grain size D is represented by the following form 1/T_B=A'-B'Iog D (a) where A' and B' are constants. However, this relation does not hold when the bending speed becomes higher and the grain size is larger. (2) In the regions of higher bending speed and of larger grain size, the non-ductile transition temperature is lower than that estimated from eq.(a) and the difference between them increases with increasing speed and grain size. It may be considered that difference arises because the plastic constraint force is affected by grain size.
社団法人日本材料学会の論文
1978-08-15