• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2023, Vol. 59 ›› Issue (8): 1-8.doi: 10.3901/JME.2023.08.001

• 仪器科学与技术 • 上一篇    下一篇

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航空功能涂层表界面完整性参数超声检测反演原理及其应用

林莉1, 马志远1, 孙珞茗1, 罗忠兵1, 雷明凯2   

  1. 1. 大连理工大学无损检测研究所 大连 116024;
    2. 大连理工大学材料科学与工程学院 大连 116024
  • 收稿日期:2022-01-15 修回日期:2022-10-28 出版日期:2023-04-20 发布日期:2023-06-16
  • 通讯作者: 马志远,男,1986年出生,博士,副教授,硕士研究生导师。主要研究材料无损检测与评价。E-mail:zhiyma@dlut.edu.cn
  • 作者简介:林莉,女,1970年出生,博士,教授,博士研究生导师。主要研究方向为材料无损检测、表征与评价。E-mail:linli@dlut.edu.cn
  • 基金资助:
    国家自然科学基金(52075078,51805072); 兴辽英才计划(XLYC1902082); 国家重点研发计划(2019YFA0708900)资助项目

Inversion Principle and Application of Ultrasonic Detecting Surface or Interface Integrity Parameters of Aviation Functional Coatings

LIN Li1, MA Zhi-yuan1, SUN Luo-ming1, LUO Zhong-bing1, LEI Ming-kai2   

  1. 1. NDT & E Laboratory, Dalian University of Technology, Dalian 116024;
    2. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024
  • Received:2022-01-15 Revised:2022-10-28 Online:2023-04-20 Published:2023-06-16

摘要: 热障涂层、吸波涂层等航空功能涂层缺陷、几何、结构、性能等表界面完整性参数的精准控制,对于兼顾、平衡其综合性能至关重要。提出航空功能涂层表界面完整性多参数的超声检测反演原理。原理基于超声波在涂层多界面结构中的作用机制,将模型正则化、数据正则化与灵敏度矩阵分析相结合,提出面向材料的特征检测信号正则化策略,并依据特征检测信号与表界面完整性多参数的相关性,发展了基于灵敏度矩阵(Sensitivity matrix, SM)的涂层表界面完整性多参数超声反演方法。以等离子体喷涂Al2O3涂层多个弹性常数的超声检测为例,阐述超声检测原理的实施效果。结果表明Al2O3涂层弹性常数C11、C13、C33、C44的反演结果分别为158.9 GPa、44.1 GPa、244.1 GPa、31.6 GPa,其中C44的反演结果与试验结果之间相对误差不超过4.5%。所提出的超声检测反演原理为基于传统“试错法”超声检测难以解决的多参数复杂无损检测问题提供有效解决途径。

关键词: 涂层, 表界面完整性, 超声检测, 参数反演, 灵敏度矩阵

Abstract: Accurate control of surface/interface integrity parameters included defect, geometry, structure, and property of thermal barrier coatings, absorbing coatings, and other aviation functional coatings is of great importance to balance their comprehensive performance. A new principle of ultrasonic detecting surface/interface integrity parameters of aviation functional coatings is presented.Based on the response mechanism of ultrasonic propagation in multi-interface coating structure, a material-oriented regularization strategy of characteristic detection signal is proposed, which includes model regularization, data regularization, and sensitivity matrix analysis. A sensitivity matrix based inversion method of ultrasonic detecting surface/interface integrity parameters is developed according to the correlation between characteristic detection signal and surface/interface integrity parameters. Taking the ultrasonic detection of elastic constants of plasma sprayed Al2O3 coating as an example, the validity of proposed ultrasonic detection principle is illustrated.Resultsshow that the inversed elastic constants C11, C13, C33, and C44 of Al2O3 coating are 158.9 GPa, 44.1 GPa, 244.1GPa, and 31.6 GPa, respectively, and the relative errors between them and the experimental results are less than 4.5 %. The proposed ultrasonic inversion principle provides an effective path for solving the complex ultrasonic non-destructive detecting problems with multiple unknown parameters which are difficult for traditional “trial-and-error” ultrasonic detecting methods.

Key words: coating, surface/interface integrity, ultrasonic detection, parameter inversion, sensitivity matrix

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