Eddy current testing of internal defect in additive/subtractive hybrid manufacturing

被引：0
|
作者：
Wang L. [1 ,2 ]
Zhang B. [2 ]
Peng Y. [3 ]
Xie G. [3 ]
Bai Q. [1 ]
Wang Y. [1 ,2 ]
机构：
[1] Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian
[2] Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen
[3] Technology Center, Xi'an Aero Engine Ltd., Aero Engine Corporation of China, Xi'an
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2020年 / 41卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Additive/subtractive hybrid manufacturing; Eddy current testing; Excitation frequency; Internal defect; Lift-off distance; Testing depth;
D O I：
10.7527/S1000-6893.2019.23170
中图分类号：
学科分类号：
摘要：
Eddy Current Testing (ECT) technology is suitable for the complex processing environment of Additive/Subtractive Hybrid Manufacturing (ASHM) due to its non-contact, couplant-free and high-sensitive features. An analytical model is established to calculate the internal current distribution of the semi-infinite sample without defects. A titanium alloy sample with internal artificial-defects is fabricated by ASHM and the ECT experiments are conducted on it to study the effect of the excitation frequency and the lift-off distance on the testing depth. Both the theoretical and experimental results show that for a deep internal defect, a lower excitation frequency leads to a larger reactance increment signal and the lift-off distance has little effect on the reactance increment signal. The study concludes that the optimal excitation frequency of ECT is 90 kHz, and the optimal lift-off distance is 0.97 mm. The conclusion provides a theoretical foundation for the integration of ASHM and ECT. © 2020, Press of Chinese Journal of Aeronautics. All right reserved.
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