改进EMAT蝶线圈用于检测合金板上的缺陷
Dazhao Chi1, Guangyu Sun1, Haichun Liu2
1State Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel, Switzerland)
|July 12, 2025
概括
这项研究优化了蝶线圈电磁声传感器 (EMAT) 的参数,以抑制干扰的纵向波,增强剪波检测,用于对合金进行非破坏性测试. 这提高了缺陷检测的灵敏度,使得深层内部缺陷的识别.
科学领域:
- 材料科学 材料科学 材料科学
- 非破坏性测试是指非破坏性测试.
- 电磁主义 电磁主义
背景情况:
- 传统的超声波测试在高温环境和合物污染的情况下面临局限性.
- 电磁声学传感器 (EMAT) 提供了无接的无线声传感器解决方案,但蝶线圈设计可以产生干扰的纵向波 (L波).
研究的目的:
- 优化蝶线圈EMAT参数,用于对合金进行非破坏性测试.
- 为了抑制L波干扰并增强剪切波 (S波) 检测,以改善缺陷特征.
主要方法:
- 采用模拟实验方法,利用有限元 (FE) 模型可视化EMAT声场并预测信号.
- 进行了直角模拟,以测试激发频率,线径和有效线圈宽度.
- 优化的EMAT在具有人工缺陷的样品上经过实验验证.
主要成果:
- 模拟和测量EMAT信号显示出强烈的相关性,验证了优化的参数.
- 优化的蝶线圈EMAT成功地抑制了L波干扰.
- 提高了缺陷检测灵敏度,允许在37毫米深处检测到3毫米平底孔.
结论:
- 优化的蝶线圈EMAT设计显著提高了对合金的非破坏性测试能力.
- 该方法提供了一种可靠的方法,用于在具有挑战性的环境中检测内部缺陷.
- 模拟实验方法为EMAT优化提供了一个强大的框架.
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