Development of Geometrical Models of Hard-Alpha Inclusions for Ultrasonic Analysis in Titanium Alloys

Geometrical and Ultrasonic Modeling of Hard-Alpha Defect Components in Titanium Alloys

“…The process involves first determining the boundary of the defect regions in an image. For this, automated flaw region and flaw boundary extraction algorithms have been previously developed [5]. Due to the complexity of the void structures and the inconsistency of the metallograph quality, however, we found that manually tracing the defect boundary to be the most reliable method.…”

Overview of the ETC POD Methodology

“…As noted above, the methodology incorporates physical models of the inspection process, and an important step is the validation of these model predictions. Detailed validations have been conducted for flat-bottom holes (FBH) and synthetic hard alpha inclusions (SHA) [5][6][7] and similar effects are in progress for naturally occurring defects [8,9].…”