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Correlation between Ultrasonic Nonlinearity and Elastic Nonlinearity in Heat-Treated Aluminum Alloy

Title
Correlation between Ultrasonic Nonlinearity and Elastic Nonlinearity in Heat-Treated Aluminum Alloy
Author
장경영
Keywords
Ultrasonic Nonlinearity; Elastic Nonlinearity; Tensile Test; Aluminum Alloy; Heat Treatment
Issue Date
2017-04
Publisher
KOREAN SOC NONDESTRUCTIVE TESTING
Citation
JOURNAL OF THE KOREAN SOCIETY FOR NONDESTRUCTIVE TESTING, v. 37, no. 2, page. 115-121
Abstract
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.
URI
http://koreascience.or.kr/article/JAKO201718054545650.pagehttps://repository.hanyang.ac.kr/handle/20.500.11754/158812
ISSN
1225-7842; 2287-402X
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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