장경영
2021-02-19T02:19:11Z
2021-02-19T02:19:11Z
2017-04
JOURNAL OF THE KOREAN SOCIETY FOR NONDESTRUCTIVE TESTING, v. 37, no. 2, page. 115-121
1225-7842
2287-402X
http://koreascience.or.kr/article/JAKO201718054545650.page
https://repository.hanyang.ac.kr/handle/20.500.11754/158812
The nonlinear ultrasonic technique is a potential nondestructive method to evaluate material degradation, in which the ultrasonic nonlinearity parameter is usually measured. The ultrasonic nonlinearity parameter is defined by the elastic nonlinearity coefficients of the nonlinear Hooke’s equation. Therefore, even though the ultrasonic nonlinearity parameter is not equal to the elastic nonlinearity parameter, they have a close relationship. However, there has been no experimental verification of the relationship between the ultrasonic and elastic nonlinearity parameters. In this study, the relationship is experimentally verified for a heat-treated aluminum alloy. Specimens of the aluminum alloy were heat-treated at 300°C for different periods of time (0, 1, 2, 5, 10, 20, and 50 h). The relative ultrasonic nonlinearity parameter of each specimen was then measured, and the elastic nonlinearity parameter was determined by fitting the stress-strain curve obtained from a tensile test to the 5th-order-polynomial nonlinear Hooke’s equation. The results showed that the variations in these parameters were in good agreement with each other.
This research was supported by the Nuclear Power Research and Development Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2013M2A2A9043241).
en_US
KOREAN SOC NONDESTRUCTIVE TESTING
Ultrasonic Nonlinearity
Elastic Nonlinearity
Tensile Test
Aluminum Alloy
Heat Treatment
Correlation between Ultrasonic Nonlinearity and Elastic Nonlinearity in Heat-Treated Aluminum Alloy
Article
2
37
115-121
비파괴검사학회지
Kim, Jongbeom
Jhang, Kyung-Young
2017019015
S
COLLEGE OF ENGINEERING[S]
DIVISION OF MECHANICAL ENGINEERING
kyjhang