Download or read book An in Situ Weld Defect Detector Acoustic Emission written by W. D. Jolly and published by . This book was released on 1968 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes an investigation of the application of acoustic emission to the detection of weld defects during and immediately following the welding operation. Both manual and machine welds fabricated by the gas tungsten-arc process produce acoustic emission. Acoustic emission from welds in 304L and 316 SS is examined in detail. A correlation is made between acoustic emission rate and radiographic analysis data. A relationship between acoustic emission rate and weld defect region temperature is demonstrated. Acoustic emission pulse characteristics and spectral power distribution are presented. Problems involved in locating weld defects by means of acoustic emission signals are discussed.