Abstract
The present investigation was carried out to as certain the effect of nitrogen on the elongation at yield-point and the serrated deformation in steel. The experiment was carried out on steels containing Si, denitrogenized by Al or Ti, annealed in hydrogen or nitrogen atmosphere or high vacuum. The shape of the specimens and the method of experiment, etc., are entirely the same as those mentioned in the 8the report.
From the present investigation authors concluded as follows:
(1) The Serrated-deformation appeared at about 180° decreased with the increas of Si, but the same appeared at about 250° increased with the increas of Si. (2) By the addition of Al or Ti, by the annealing in hydrogen atmosphere or high vacuum, the serrated-deformation and the elongation at yield-point was seen to decrease. (3) By the annealing in nitrogen atmosphere the serrated deformation and the elongation at yield-ptoint was seen to increase.
