Abbasi Zeynab, Yuhas Donald, Zhang Lu, Basantes Alexandra-Del-Carmen, Tehrani Niloofar Nabili, Ozevin Didem, Indacochea Ernesto
Civil & Materials Engineering Department, University of Illinois at Chicago, Chicago 60607, IL, USA.
Industrial Measurement Systems Inc., Aurora 60502, IL, USA.
Materials (Basel). 2018 Jan 13;11(1):128. doi: 10.3390/ma11010128.
Nearly all manufactured products in the metal industry involve welding. The detection and correction of defects during welding improve the product reliability and quality, and prevent unexpected failures. Nonintrusive process control is critical for avoiding these defects. This paper investigates the detection of burn-through damage using noncontact, air-coupled ultrasonics, which can be adapted to the immediate and in-situ inspection of welded samples. The burn-through leads to a larger volume of degraded weld zone, providing a resistance path for the wave to travel which results in lower velocity, energy ratio, and amplitude. Wave energy dispersion occurs due to the increase of weld burn-through resulting in higher wave attenuation. Weld sample micrographs are used to validate the ultrasonic results.
金属行业中几乎所有的制成品都涉及焊接。焊接过程中缺陷的检测与修正可提高产品的可靠性和质量，并防止意外故障。非侵入式过程控制对于避免这些缺陷至关重要。本文研究了使用非接触式空气耦合超声检测烧穿损伤，这种方法可适用于对焊接样品进行即时和原位检测。烧穿会导致焊接区域的降解体积增大，为波的传播提供了一个阻力路径，从而导致波速、能量比和振幅降低。由于焊接烧穿的增加导致波衰减更高，从而发生波能量色散。焊接样品显微照片用于验证超声检测结果。
