銅線の剛性率の冷間加工および焼鈍による変化についで (2)

抄録

Continued from the preceding experiment, the effects of cold-work and annealing on the rigidity of copper wire are observed by the method of torsion pendulum. This time, cold-twisted copper wires are employed as the specimens.
The results obtained are as follows. (Fig. 1). (1). From a certain annealing temperature T₁', the rigidity becomes almost constant. (2). From another temperature T₂', the rigidity decreases very rapidly. (3). The temperatures T₁', T₂' shift upward with the decrease of the degree of cold-work assigned to the specimens.
From the above and previous results, the cause of the increase of rigidity of cold-drawn copper wire by low temperature annealing is discussed.