James J. Wall

TL;DR: In this article, nonlinear ultrasound was used to monitor radiation damage in two reactor pressure vessel (RPV) steels, and the results showed a clear increase in the measured acoustic nonlinearity from the unirradiated state to the medium dose, and then a decrease from medium dose to high dose.

TL;DR: A review of the current state of knowledge on the effects of radiation on concrete in nuclear applications is presented in this paper, where the authors focus on changes in engineering properties of concrete in the evaluation of the long-term operation (LTO) and for Plant Life or Aging Management of nuclear power plants (NPPs) in Japan, Spain, and United States.

TL;DR: In this article, the effects of copper precipitates on the acoustic nonlinearity parameter of 17-4PH stainless steel were investigated using nonlinear ultrasonic measurements using Rayleigh waves, consistent with evidence of copper precipitation from hardness, thermo-electric power, transmission electron microscopy and atom probe tomography measurements.

TL;DR: In this paper, a combined X-ray diffraction, EELS and DFT study of the reaction of rhenium with carbon at high-(P, T) conditions up to P(max) = 67 GPa and T(max), = 3800 K is presented.

TL;DR: The experimental results show that the acoustic nonlinearity parameter is sensitive to early-stage microcrack formation under both loading conditions - the measured β can be directly linked to the accumulated microscale damage.