Feasibility study of the characterization of planar defects in a circular weld with TFM

For those interested in TFM applications and its validation in CIVA, read this paper from Dr. Souad BANNOUF, presented at ECNDT 2018 and dealing with the characterization of planar defects in a circular weld with TFM.

This paper reports results from a feasibility study carried out by EXTENDE and EDF CEIDRE about characterization of planar defects located in a welded cylindrical specimen with the Total Focusing Method (TFM). First, the characterization of EDM notches in a welded part with a complex internal profile is evaluated by simulation. The simulated results are compared to experimental ones and show good agreement. A characterization procedure for planar defects with TFM is proposed. It is applied to fatigue cracks and shows convincing results. Detection but also characterization of planar breaking backwall defects seem possible with TFM when using LL direct mode reconstruction of the region of interest. However, corner echo mode reconstruction may also complete and confirm the defect characterization depending on some conditions detailed in this paper (probe positioning, geometry knowledge, …).

To read the full article, you can visit our article library here.

The EXTENDE team