抄録
Load-elongation curves of single crystals of Cu–Al solid solutions of 1.2, 2.3, 6.5, 10.5 and 14.2 at % aluminum are measured at room temperature, the liquid nitrogen temperature and the liquid helium temperature. Serrations are observed in the load-elongation curves in the stages I and II. The increase of yield stress on annealing at 200°C and the dependence of yield stress and yield drop on the crystallographic orientation of the tensile axis are also observed. From these experimental results, the hardening of Cu–Al solid solutions is concluded to be due to a source hardening mechanism. The “pole mechanism” for glide dislocations is considered as the origin of the serrations in the stage I . Annealing effects on several work-hardening parameters are also observed.
