抄録
The temperature dependence of the tensile deformation of α-brass (70 : 30 brass) shows some discontinuous remarkable phenomena, among which the repeated yielding (serration) and the abnormal work hardening were investigated.
In the temperature range below about 250°C, serrations of upward jerk appear at a certain level of strain until fracture and the strain to induce serrations moves toward the low strain side with rising temperature. In the range above about 250°C, the strain to initiate serrations contralily moves toward the high strain side as temperature rises, with serrations of downward jerk appearing only in a limited region of strain. Furthermore, immediately after disappearance of the serrations, abnormal work hardening phenomenon is observed.
These phenomena are discussed from the point of view of the interaction between solute atoms and dislocations and of the grain boundary behaviors at elevated temperatures.
