Page 110 - 《应用声学》2022年第6期

第 41 卷 第 6 期 Vol. 41, No. 6
2022 年 11 月 Journal of Applied Acoustics November, 2022

⋄ 研究报告 ⋄

应用混频超声检测微小缺陷

沙正骁 1,3,4 曾甘露 2† 梁 菁 1,3,4 陆铭慧 2 何方成 1,3,4 陆传雨 2

(1 中国航发北京航空材料研究院 北京 100095)
(2 南昌航空大学 南昌 330063)
(3 航空材料检测与评价北京市重点实验室 北京 100095)
(4 中国航空发动机集团材料检测与评价重点实验室 北京 100095)
摘要：高端飞行器的可靠性往往受限于其发动机内部盘、板等构的结构强度和使用寿命，因此对这类部件的
无损检测在制造业上具有巨大需求。超声检测作为一种应用广泛、高效、环保的检测方法，常常被应用于这类
构件的检测中。但是，大厚度盘、板类构件内的微小缺陷反射能力弱，常规超声脉冲反射法无法进行有效检测。
为实现大厚度盘、板类构件内部微小缺陷的识别和定位，采用共线异侧纵波混频法，通过和差频信号特征识别
微小缺陷；研究缺陷埋深变化对混频效果的影响，通过测量和差频信号幅值变化，实现微小缺陷的深度定位。
结果表明：该方法可有效识别 7075 铝合金中埋深 80 mm 的 ϕ0.2 mm 横孔微缺陷，且可实现微小缺陷的深度定
位。
关键词：共线异侧混频；和差频信号；微小缺陷定位
中图法分类号: TG115.28 文献标识码: A 文章编号: 1000-310X(2022)06-0956-08
DOI: 10.11684/j.issn.1000-310X.2022.06.013

Detection of micro defects by mixing ultrasound

SHA Zhengxiao 1,3,4 ZENG Ganlu 2 LIANG Jing 1,3,4 LU Minghui 2
HE Fangcheng 1,3,4 LU Chuanyu 2

(1 AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China)
(2 Nanchang Hangkong University, Nanchang 330063, China)
(3 Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation, Beijing 100095, China)
(4 Key Laboratory of Science and Technology on Aeronautical Materials Testing and Evaluation,
Aero Engine Corporation of China, Beijing 100095, China)

Abstract: The reliability of high-end aircraft is often limited by the structural strength and service life of
its engine internal disks and plates. Therefore, there is a huge demand for nondestructive testing of such
components in the manufacturing industry. As a widely used, efficient and environment-friendly testing method,
ultrasonic testing is often used in the testing of this kind of components. However, the reflection ability of micro
defects in large thickness disks and plates is weak, and the conventional ultrasonic pulse reflection method can
not detect them effectively. In order to realize the identification and location of micro defects in large thickness
disks and plates, the collinear anisotropic longitudinal wave mixing method is used to identify micro defects
through sum and difference frequency signal characteristics. The influence of the change of defect buried depth
on the mixing effect is studied. The depth location of micro defects is realized by measuring the amplitude
change of differential frequency signal. The results show that this method can effectively identify the ϕ0.2 mm
transverse hole micro defects with a buried depth of 80 mm in 7075 aluminum alloy, and can realize the depth
location of micro defects.
Keywords: Collinear opposite side mixing; Sum difference frequency signal; Minor defect location
2021-09-15 收稿; 2022-01-18 定稿
作者简介: 沙正骁 (1985– ), 男, 山东济南人, 硕士, 工程师, 研究方向: 航空材料超声无损检测。
† 通信作者 E-mail: 1345746568@qq.com