Repeated Yielding and Abnormal Hardening in High-Temperature Tensile Deformation of α-Brass

Abstract

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.

Hot Shortness of α-Brass

“…The preparation of specimens and the tensile tests were carried out in the same way as mentioned in the preceding paper (17). In order to clarify the causes for hot shortness, tensile tests were performed between room microscopy.…”

“…10. This serves to at room temperature, indicating a remarkable work hardening inside the grain (17). At higher temperatures, the resistance to deformation inside the grain remarkably falls, causing the difficult sliding of grain boundary.…”

“…Recently, however, various deformation phenomena of matter of hot shortness should be investigated in relation to its bearing on the conditions of grain boundary, lattice defect, and the behaviors of solute atoms. In the preceding report on the tensile deformation kinds of discontinuous abnormal phenomena in the temperature dependence of the strength and the deformation behaviors of the alloy (17). and electron microscope observations were carried out.…”