純チタン細線の引張り負荷に伴う表面高度変化

抄録

Thin metal wires and films have been used for various industrial fields such as automobiles, sports equipments, and medical products. It is therefore important to evaluate their strength, microscopic deformation, and micro cracking behavior. In this paper, thin wires of pure titanium were focused on and the tensile tests were carried out on the stage of the digital holographic microscope. The surface height was measured around the center of grains at each loading step and their change during loading steps were examined. The surface height was scattered for each grain and the change in the height by a unit tensile stress increased with the tensile load. This result suggests that the microscopic inhomogeneity at the latter stage of tension is predictable from that at the early stage of the tension.