Using Phased Array Ultrasonics for Detecting and Sizing Cracks in Welds

摘要

The current AWS approach for detecting and sizing cracks, as well as newer phased array technology, are detailed. Due to a number of technological advantages, phased arrays are becoming the inspection method of choice for welds, including for work done under the requirements of AWS D1.1, Structural Welding Code - Steel. This article describes the current AWS approach for detecting and sizing cracks - often the critical factor in welding of infrastructure - and some further developments. Crack detection is well established and generally good; sizing is more problematic. Advanced sizing developments are typically beyond the D1.1 inspection requirements, and may be beyond those of any code, but are listed here as they are technically available.