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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

To help NDE professionals to master the necessary tools & methodologies for NDE reliability evaluation, EXTENDE offers a new training on this topic, in partnership with PHIMECA and CEA.

This multi-sector training (aerospace, oil & gas, nuclear …), deals with main notions regarding: 

•        Influential parameters sensitivity analysis,
•        POD curves and other statistical indicators (PFA, ROC, POR, etc.),
•        Applicable standards, handbooks and recommended practices regarding NDT reliability, qualification & performance demonstration (ASME BPVC, RSEM, MH1823, DNV-OS-F101, etc.),
•        The benefits of simulation (parametric studies, metamodels, MAPOD).

Many practical exercises on various examples and tools are planned (statistical computation & analysis) aiming at a pragmatic & pedagogic approach to these methodologies.

The first session will take place from December 10^th to 12^th 2018 (this session will be in French only, sessions in English are planned for 2019).

For any question & registrations, please contact us at contact@extende.com

The EXTENDE team