增减材复合制造内部缺陷的涡流检测

doi:10.7527/S1000-6893.2019.23170

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2020, Vol. 41 ›› Issue (3): 423170-423170.doi: 10.7527/S1000-6893.2019.23170

• Material Engineering and Mechanical Manufacturing • Previous Articles Next Articles

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

WANG Longqun^1,2, ZHANG Bi², PENG Ying³, XIE Guoyin³, BAI Qian¹, WANG Yibo^1,2

1. Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China;
2. Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China;
3. Technology Center, Xi'an Aero Engine Ltd., Aero Engine Corporation of China, Xi'an 710021, China

Received:2019-05-20 Revised:2019-11-01 Online:2020-03-15 Published:2019-10-31
Supported by:
National Natural Science Foundation of China (51605077); Fundamental Research Layout of Shenzhen (JCYJ20170817111811303); Collaborative Innovation Program of Shenzhen (GJHZ20180411143506667)

Abstract

Abstract: 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.

Key words: eddy current testing, additive/subtractive hybrid manufacturing, internal defect, testing depth, excitation frequency, lift-off distance

CLC Number:

TG115.28

WANG Longqun, ZHANG Bi, PENG Ying, XIE Guoyin, BAI Qian, WANG Yibo. Eddy current testing of internal defect in additive/subtractive hybrid manufacturing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(3): 423170-423170.

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

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