This paper presents a comprehensive review of the current state of knowledge of second
harmonic generation (SHG) measurements, a subset of nonlinear ultrasonic nondestructive …

Due to their sensitivities to a specimen's microstructural evolution during processes
including heat treatment and plastic deformation, ultrasonic measurements of the acoustic …

This paper describes the use of non-linear ultrasonic techniques for the characterization of
material degradation in 99.98% pure copper due to high-temperature creep. Flat dog-bone …

A new approach based on nonlinear ultrasonic (NLU) technique is presented for
nondestructive evaluation of yield strength and tensile strength of cold worked AISI type 304 …

The effect of tensile plastic deformation on the nonlinear ultrasonic response of austenitic
stainless steel was examined, using nonlinear longitudinal wave. The plastic deformation …

Industrial gas turbines are used for generating electricity or driving other turbomachinery
with the continuous development goal of further increasing machine efficiency. This is …

A nonlinear constitutive relationship was established to investigate nonlinear behaviors of
ultrasonic wave propagation in plastically damaged media based on analyses of mixed …

Owing to their high sensitivity to material microstructural defects, nonlinear guided waves
(NGWs) show great promise for the early detection of incipient damages, conducive to …

Background The use of the Taylor-Quinney coefficient for introducing a thermal dissipation
term into material models relies on understanding its dependencies. These are usually …

Harmonic generation is a promising technique for measuring small changes in the
microstructure of components. Its extreme sensitivity is a benefit for detection, but results in a …