粉末高温合金微缺陷的超声环形阵列全聚焦成像检测

基金项目:

国家自然科学基金资助项目（50515449，52075049）

详细信息

Ultrasonic annular array total focusing imaging inspection ofmicro-defects in powder metallurgy superalloy

1. AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China;
2. Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation, Beijing 100095, China;
3. Key Laboratory of Materials Testing and Evaluation, Aero Engine Corporation of China, Beijing 100095, China;
4. School of Materials Science and Engineering, Beihang University, Beijing 100191, China

摘要: 为了满足大厚度粉末高温合金零件的高灵敏度检测需求，提出了基于超声环形阵列的全聚焦成像检测方法。从检测灵敏度、信噪比和近表面分辨力3个方面入手，验证了该检测方法的可行性。与常规相控阵多深度聚焦检测方法进行试验对比，结果表明，该方法在灵敏度一致性、近表面分辨力等方面具有显著优势，可为粉末高温合金微缺陷的检测提供一种先进可行的技术。
- 粉末高温合金 /
- 全聚焦方法 /
- 环形阵列
Abstract: For the high-sensitivity inspection requirements of large-thickness parts of powder metallurgy superalloy, total focusing method using ultrasonic annular array was proposed. The feasibility of the method has been verified from the detection sensitivity, signal-to-noise ratio and near-surface resolution. Comparative experiments have been carried out with the multi-depth focusing method of conventional phased array technique and it shows that total focusing method has significant advantages in consistency of detection sensitivity and near-surface resolution. The research work provides an advanced and feasible technology for the detection of micro-defects in powder metallurgy superalloys.
- powder metallurgy superalloy /
- total focusing method /
- annular array

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