SUMMARY

This research investigates the contribution of different microstructural damage, such as dislocation, precipitates along grain boundaries, and precipitates in grain structure, to the nonlinear elastic behavior. This research focuses on not only investigating but also comparing classical and nonclassical (hysteresis) nonlinearity through the techniques of second harmonic generation and nonlinear resonance ultrasound spectroscopy. This research focuses on nonlinearity that occurs in metals due to these microstructural damages.