@inproceedings{670f5ae729544d5fa650f011463ad85b,
title = "Assessment of precipitation in alloy steel using nonlinear Rayleigh surface waves",
abstract = "Nonlinear ultrasonic waves have shown to be sensitive to various microstructural changes in metals including coherent precipitates; these precipitates introduce a strain field in the lattice structure. The thermal aging of certain alloy steels leads to the formation of coherent precipitates, which pin dislocations and contribute to the generation of a second harmonic component. A precipitate hardenable material namely 17-4 PH stainless steel is thermally treated in this research to obtain different precipitation stages, and then the influence of precipitates on the acoustic nonlinearity parameter is assessed. Conclusions about the microstrucutural changes in the material are drawn based on the results from a nonlinear Rayleigh surface wave measurement and complementary thermo-electric power, hardness and ultrasonic velocity measurements. The results show that the nonlinear parameter is sensitive to coherent precipitates in the material and moreover that precipitation characteristics can be characterized based on the obtained experimental data.",
keywords = "Nonlinear Ultrasound, Precipitation, Ultrasonic Testing",
author = "Sebastian Thiele and Matlack, {Kathryn H.} and Kim, {Jin Yeon} and Jianmin Qu and Wall, {James J.} and Jacobs, {Laurence J.}",
year = "2014",
doi = "10.1063/1.4864886",
language = "English",
isbn = "9780735412118",
series = "AIP Conference Proceedings",
pages = "682--689",
booktitle = "40th Annual Review of Progress in Quantitative Nondestructive Evaluation - Incorporating the 10th International Conference on Barkhausen Noise and Micromagnetic Testing",
note = "40th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2013, Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013 ; Conference date: 21-07-2013 Through 26-07-2013",
}