粉末高温合金微缺陷的超声环形阵列全聚焦成像检测  

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

作　　者：徐娜 许路路 史亦韦 何方成 XU Na;XU Lulu;SHI Yiwei;HE Fangcheng(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation,Beijing 100095,China;Key Laboratory of Materials Testing and Evaluation,Aero Engine Corporation of China,Beijing 100095,China;School of Materials Science and Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]航空材料检测与评价北京市重点实验室,北京100095 [3]中国航空发动机集团材料检测与评价重点实验室,北京100095 [4]北京航空航天大学材料科学与工程学院,北京100191

出　　处：《无损检测》2022年第1期1-5,共5页Nondestructive Testing

基　　金：国家自然科学基金资助项目(50515449,52075049)。

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。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.

关 键 词：粉末高温合金 全聚焦方法 环形阵列 

分 类 号：TG115.28[金属学及工艺—物理冶金]