材料工程与机械制造

增减材复合制造内部缺陷的涡流检测

  • 王龙群 ,
  • 张璧 ,
  • 彭颖 ,
  • 谢国印 ,
  • 白倩 ,
  • 王义博
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  • 1. 大连理工大学 精密与特种加工教育部重点实验室, 大连 116024;
    2. 南方科技大学 机械与能源工程系, 深圳 518055;
    3. 中国航发西安航空发动机有限公司 技术中心, 西安 710021

收稿日期: 2019-05-20

  修回日期: 2019-11-01

  网络出版日期: 2019-10-31

基金资助

国家自然科学基金(51605077);深圳市基础研究(学科布局)项目"高性能高温合金增材制造的技术研究"(JCYJ20170817111811303);深圳市国际合作研究项目"增减材复合制造关键技术研究"(GJHZ20180411143506667)

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

  • WANG Longqun ,
  • ZHANG Bi ,
  • PENG Ying ,
  • XIE Guoyin ,
  • BAI Qian ,
  • WANG Yibo
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  • 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 date: 2019-05-20

  Revised date: 2019-11-01

  Online 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)

摘要

涡流检测(ECT)技术具有非接触、无需耦合剂、检测灵敏等特点,适用于加工环境较为特殊的增减材复合制造(ASHM)中。本文建立了无缺陷半无限大试样内部涡流分布的解析模型,开展了预制人工缺陷的钛合金增材试样检测实验,研究了ECT深度与激励频率、提离量之间的关系。理论分析与实验结果均表明,内部缺陷较深时,低激励频率条件下缺陷产生的电抗增量信号较大,不同提离量下的电抗增量信号相差不大,因此检测位置较深的内部缺陷时可采用较低的激励频率并适当提高提离量。在本文实验条件下,ECT最佳激励频率为90 kHz;提离量增加到0.97 mm时,有效检测深度略有减小。这一结论可为ECT技术与ASHM的集成提供理论依据。

本文引用格式

王龙群 , 张璧 , 彭颖 , 谢国印 , 白倩 , 王义博 . 增减材复合制造内部缺陷的涡流检测[J]. 航空学报, 2020 , 41(3) : 423170 -423170 . DOI: 10.7527/S1000-6893.2019.23170

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.

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