What Can Go Wrong With Time-of-Flight Evaluation in Aluminium Extrusion Sections-

https://ultrasound-inspection-review.silverstonebrief.com/posts/choosing-an-ndt-method-for-pipeline-girth-welds-common-pitfalls-and-fixes

What Can Go Wrong With Time-of-Flight Evaluation in Aluminium Extrusion Sections? Extrusions can contain thin walls, ribs, and long flat faces. Echo travel time helps locate reflectors or measure sound path in a material