塑性変形による弾性異方性の変化に関する超音波的研究

概要

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Measurements of the velocities of ultrasonic transverse waves were performed to investigate the development of elastic anisotropy of a polycrystalline metal with plastic deformation. From the same bar of steel S18C, specimens were so prepared that the velocities υ_1 and υ_2 of two polarized transverse waves could be measured for several propagation directions in a series of states deformed plastically by uni-axial compression along the bar axis. The results show that the anisotropy of the material is composed of an initial transversc isotropy, and a transverse isotropy developed in proportion to the plastic compressive strain ; these are slightly different in type, and opposite in sign. The latter transverse isotropy is also shown to be similar to that expected by the Voigt model of a polycrystalline aggregate.
一般社団法人日本機械学会の論文
1988-10-25