Resonant ultrasound spectroscopy and homogeneity in polycrystals
Keywords: 43.20.Ye; 43.35.Cg; 43.35.Yb; 43.35.Zc; 43.40.At; 43.40.Cw; Resonant ultrasound spectroscopy; Elasticity; Grain size; Polycrystalline copper;