中国机械工程2017，Vol.28Issue(21)：2582-2587,6.DOI:10.3969/j.issn.1004-132X.2017.21.012
LY12硬铝合金损伤缺陷的空气耦合超声检测
Air-coupling Ultrasonic Testing of Defects in LY12 Duralumin Alloys
摘要
Abstract
To deal with problems of traditional ultrasonic testing by liquid or semi-solid couplant caused corrosions of tested materials,a method of air coupling ultrasonic testing for duralumin LY12 defects was proposed.An air coupling ultrasonic control equation for the duralumin LY12 was established by transfer matrix method.Dispersion characteristic curves of ultrasonic wave propagation were obtained due to solve this equation.These results show that all the models shift toward right by comparison with that of existing conventional couplant.The results provide suitable parameters for the air coupling ultrasonic testing.Through analyzing time domain signals of different defects in the LY12 duralumin alloys,it may be obtained that transmission wave amplitude decreases with the increases of defect diameters.关键词
硬铝合金LY12/超声检测/空气耦合/频散曲线Key words
LY12 duralumin alloy/ultrasonic testing/air coupling/dispersion curve分类
通用工业技术引用本文复制引用
王兴国,吴文林,陈正林,吴南星..LY12硬铝合金损伤缺陷的空气耦合超声检测[J].中国机械工程,2017,28(21):2582-2587,6.基金项目
国家自然科学基金资助项目(51565020,51305184) （51565020,51305184）
江西省自然科学基金资助项目(20171BAB206032) （20171BAB206032）
江西省教育厅科技项目(GJJ150925) （GJJ150925）
