極低炭素綱の下降伏応力に及ぼす温度およびひずみ速度の影響について

概要

論文の詳細を見る
The relationship between lower yield stress and strain rate has been measured on a low carbon steel at various temperatures. The results obtained are summarized as follows : (1) Deformation twins were observed in Luders band under the condition of low temperature and high strain rate at which the lower yield stress value was over 50 kg/mm^2. The slope in the logarithmic plots of lower yield stress against strain rate in the range where the deformation twins were observed during propagating Luders band was lower than that without a deformation twin. (2) In the range of temperature and strain rate where no deformation twin was observed. the relation between lower yield stress and strain rate in logarithmic plots was represented by a straight line having only one or two slopes over the strain rate of 10<-5>〜10^2 1/s at a constant temperature. (3) The fact that the slope of the above straight lines at a constant temperature depends upon the strain rate may be caused by the disagreement between the Luders band front velocity and the cross head speed.
社団法人日本材料学会の論文
1975-02-15