Vol. 16, No. 4, 2021

Download this article
Download this article For screen
For printing
Recent Issues

Volume 16
Issue 4, 389–449
Issue 3, 237–388
Issue 2, 105–235
Issue 1, 1–104

Volume 15, 5 issues

Volume 14, 5 issues

Volume 13, 5 issues

Volume 12, 5 issues

Volume 11, 5 issues

Volume 10, 5 issues

Volume 9, 5 issues

Volume 8, 8 issues

Volume 7, 10 issues

Volume 6, 9 issues

Volume 5, 6 issues

Volume 4, 10 issues

Volume 3, 10 issues

Volume 2, 10 issues

Volume 1, 8 issues

The Journal
About the Journal
Editorial Board
Subscriptions
 
Submission Guidelines
Submission Form
Policies for Authors
Ethics Statement
 
ISSN: 1559-3959
Author Index
To Appear
 
Other MSP Journals
Quantifying fatigue cracks in TC4 titanium alloy using a nonlinear modulation ultrasonic testing method

Zhenhua Chen, Chenggeng Li, Guochen Xu and Chao Lu

Vol. 16 (2021), No. 4, 419–428
DOI: 10.2140/jomms.2021.16.419
Abstract

The length of the fatigue cracks is always underestimated by linear ultrasonic testing, for example that the phased array method based on linear ultrasonic technique can be used for detecting the opened crack rather than closed crack. In the paper, a novel nonlinear ultrasonic modulation method is proposed for detecting the closed crack. Firstly, the transducers’ arrangement is optimized to excite the nonlinear ultrasonic response of closed crack. Secondly, the hypothesis of quantitative measurement is given for the closed crack. Finally, the hypothesis is proved to be correct by comparing with the metallographic measurement. The results indicate that the big modulation coefficients can be extracted from the closed crack covered by the superimposed area of sound field, and the length of closed crack which cannot be detected by linear ultrasonic method can be determined by the nonlinear ultrasonic modulation method.

Keywords
titanium alloy, closed crack, nonlinear modulation coefficient, ultrasonic array technique
Milestones
Received: 8 October 2020
Revised: 5 April 2021
Accepted: 20 April 2021
Published: 26 September 2021
Authors
Zhenhua Chen
Key Laboratory of Nondestructive Testing of Ministry of Education
Nanchang Hangkong Universtiy
Nanchang, 330063
China
State Key Laboratory of Acoustics
nstitute of Acoustics, Chinese Academy of Sciences
Beijing 100190
China
Chenggeng Li
Key Laboratory of Nondestructive Testing of Ministry of Education
Nanchang Hangkong Universtiy
Nanchang, 330063
China
Guangdong Institute of Special Equipment Inspection and Research
Foshan 528251
China
Guochen Xu
Key Laboratory of Nondestructive Testing of Ministry of Education
Nanchang Hangkong Universtiy
Nanchang, 330063
China
Chao Lu
Key Laboratory of Nondestructive Testing of Ministry of Education
Nanchang Hangkong Universtiy
Nanchang, 330063
China