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首页> 外文期刊>Research in nondestructive evaluation: a journal of the American Society for Nondestructive Testing >Phased Array Ultrasonic Testing for Post-Weld and OnLine Detection of Friction Stir Welding Defects
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Phased Array Ultrasonic Testing for Post-Weld and OnLine Detection of Friction Stir Welding Defects

机译：搅拌阵列超声波检测和摩擦搅拌焊接缺陷的在线检测

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摘要

Nondestructive evaluation (NDE) techniques of phased array ultrasonic testing (PAUT) and digital X-ray radiography were employed on friction stir (FS)-welded Aluminum Alloy (AA)-2219-T87 specimens. PAUT intricacies required for scanning of FS-welded specimens with a 10-MHz 32-element transducer are discussed. The time corrected gain (TCG) calibration is required for scanning with an increase in index offset to compensate for decrease in A-Scan signal peak amplitude. Calibration techniques to find small defects with appropriate size tolerances are also established. The NDE technique of digital X-ray radiography is compared to PAUT, where it was found that a calibrated PAUT system is able to discover defects less than 0.2 mm where X-ray radiography could not. Incomplete penetration (IP), wormhole (WH), surface cavity (SC), and internal void (IV) defects are analyzed. Furthermore, an online PAUT system for FSW has been developed and successfully tested. The work provided herein will provide a gateway for an ultimate goal of an automated PAUT online sensing system.
机译：在摩擦搅拌（FS）焊接铝合金（AA）-2219-T87标本上采用了分阶段阵列超声波检测（PAUT）和数字X射线放射线术的非破坏性评估（PAUT）和数字X射线放射线。讨论了扫描具有10MHz 32元件换能器的FS焊接样品所需的PAUT复杂性。随着索引偏移量的增加，扫描时间校正增益（TCG）校准以补偿扫描信号峰值幅度的降低。还建立了找到具有适当尺寸公差的小缺陷的校准技术。将数字X射线放射照相的NDE技术与PAUT进行比较，发现校准的PAUT系统能够发现小于0.2mm的缺陷，其中X射线射线照相造影。分析不完全渗透（IP），蠕虫孔（WH），表面腔（SC）和内部空隙（IV）缺陷。此外，已经开发并成功测试了用于FSW的在线PAUT系统。这里提供的工作将提供一种用于自动PAUT在线感测系统的最终目标的网关。

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