USE OF ACOUSTIC EMISSION AS A WELD QUALITY MONITOR.
Battelle-Northwest, Richland, WA (US). Pacific Northwest Lab. (US), W.D. Jolly · 1969
Acoustic emission monitoring is discussed to provide a general understanding of this technique used as a weld quality monitor.The most important feature of the acoustic emission technique as opposed to other nondestructive testing methods is that the data is real-time; thus, one can more effectively determine the causes of the weld defects.The wideranging applications of this technique are illustrated by examples of real-time data from submerged-arc, gas tungsten are, and spot welding.Acoustic emission can be used to detect defective welds and roughly indicate the extent of the defects; moreover, crack growth can be related to other dynamic conditions of the weld.As a supplement to established weld inspection methods, acoustic emission monitoring can result in reduction of re-work costs and improvement of weld quality.