It’s important to know how to correctly interpret the level of sensitivity that the colors represent since they are relative to the maximum expected amplitude of each map. The wave set (2T), input material velocity, and flaw type (spherical) are the same for all four maps. The AIM sensitivity coverage is shown for four different probe models. The images below show an example of how you can use the AIM tool to guide your probe selection for FMC/TFM inspection. The Acoustic Influence Map (AIM) tool in the OmniScan™ X3 flaw detector enables you to compare the sensitivity coverage in the region of interest between different probes, taking into consideration the material velocity and the flaw type and orientation. With TFM inspection, there are several wave sets (sets of beams grouped according to their propagation modes), so it is impossible to visualize the impact of these parameters on each one without a proper modeling tool. For example, a large aperture (element pitch times the number of elements) combined with a high frequency tends to result in better focalization at a deeper position in the part, while a smaller aperture combined with a lower frequency tends to produce better focalization in the near-surface area. Inspectors need to find the best combination of these characteristics to suit the type of application, the characteristics of the part to inspect, and the targeted region of interest in the part. The performance of a given probe depends on the combination of the following characteristics: Since TFM obeys the same principles of physics as PAUT, which probe you choose is equally important. With standard phased array ultrasonic testing (PAUT), the probe choice is crucial to the success of your inspection. Here are the 4 essentials for building a TFM strategy for weld inspection that complies with this code:
#Transformice codes 2019 full
Nonmandatory Appendix F Examination of Welds Using Full Matrix Capture (FMC).Mandatory Appendix XI Full Matrix Capture (FMC).Its Section V, Article 4 (2019) includes the following appendixes:
#Transformice codes 2019 code
However, over time, some limitations and challenges came to light, especially for weld inspection applications.įrom selecting the probe to performing the calibration, the inspector has critical choices to make to build an optimized inspection strategy that complies with the governing code.Īt the time of writing, the only NDT industry code containing regulations that apply to FMC or TFM is the ASME Boiler and Pressure Vessel Code (BPVC). When the full matrix capture/total focusing method (FMC/TFM) was introduced to the NDT industry a few years ago, it was perceived as a revolutionary technique that would optimize inspection time and results.
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