超音波による推定降伏曲面の実験的検討

概要

論文の詳細を見る
Ultrasonic wave velocities in a plastically deformed medium are known to be dependent upon its microstructual material properties, e. g. , crystalline structure, texture, distributions of residual stress and vacancy. Therefore, the authors proposed the theoretical modeling of an ultrasonic nondestructive method to evaluate plastically deformed states ; we obtained good agreement between the numerical and experimental results on an aluminum alloy specimen subjected to uniaxial tension, and successively reported the influence of annealing effect upon the plastic anisotropy and the correlation between the Lankford's value and the shapes of yield surface of the aluminum alloy. The purpose of the present paper is to verify the subsequent yield surfaces estimated by the ultrasonic evaluation method, in which the internal variables of the anisotropic distortional yield model were determined to achieve a good fit for the experimental results of the longitudinal and transverse wave velocity changes under the plastic deformation, compared with the experimental yield surfaces of the aluminum alloy tested in combinations of tension or compression and torsion.
一般社団法人日本機械学会の論文
1994-12-25