実用軸受鋼の超微細結晶粒化と超塑性
1981 年 67 巻 16 号 p. 2710-2714
詳細
1981 年 67 巻 16 号 p. 2710-2714
An ultra-fine-grained SUJ-2 steel was obtained by applying one of thermomechanical processing routes developed in UHC-steel. This material showed the high elongation-to-failure values of 400840% at warm temperature between 650 and 730°C over a range of initial strain rates from 1 x 10-4 sec-1 to 8 × 10-4 sec-1. The value of m≅0.33 and the activation energy of 195 kJ/mol was obtained for the deformation process in this range. From these results, it could be concluded that grain boundary sliding is not totally dominating the deformation process of the present material although superplastic flow plays an important role in the region studied.
