| Issue |
Metall. Res. Technol.
Volume 119, Number 3, 2022
|
|
|---|---|---|
| Article Number | 306 | |
| Number of page(s) | 11 | |
| DOI | https://doi.org/10.1051/metal/2022026 | |
| Published online | 08 June 2022 | |
Regular Article
Evaluation of fatigue performance of resistance convex welds based on ultrasonic C-scan image analysis
1
Technical Engineering Department, CRRC Qingdao Sifang Co., Ltd, No. 88 Jinhong East Road, 266111 Chengyang District, Qingdao, PR China
2
Department of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, 130025 Changchun, PR China
3
1st branch Factory of Tool Manufacturing, North Industries Group Co,. Ltd, No. 1 Xinfu South Road, 710043 Xi’an, PR China
* e-mail: dongjuan007@163.com
Received:
10
October
2021
Accepted:
7
March
2022
Ultrasonic C-scan detection is adopted in this study to compare the connection status of resistance convex weld (RCW) before, during and after fatigue test. Based on the variation of ultrasonic echoes in different connection zones, the connection state can be observed on ultrasonic C-scan images. With the occurrence of fatigue destructive behavior, ultrasonic C-scan image changes, and so does the pixel distribution. The histogram of pixel grayscale distribution can quantitatively evaluate the fatigue limit of stainless steel RCW joint, which provides an effective method to judge the fatigue life in practical engineering application.
Key words: resistance convex weld / ultrasonic C-scan image / grayscale histogram / fatigue performance evaluation
© EDP Sciences, 2022
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