A Review of Non-Destructive Evaluation (NDE) Techniques for Residual Stress Profiling of Metallic Components in Aircraft Engines

Residual stresses are one of the main factors determining failure aircraft engine materials. It is not possible to reliably and accurately predict remaining service life components without properly accounting for presence residual stresses. The absolute level spatial distribution stress uncertain in engines because profile highly susceptible variations manufacturing process. In addition, keep evolving under complex thermal-mechanical loadings. Non-destructive techniques desired by aerospace industries regular monitoring subsurface components. insufficient penetrating capability only currently available non-destructive assessment technique X-ray diffraction has prompted an active search alternative techniques. This paper provides overview principle, practical applications, advantages, limitations four categories nondestructive (diffraction, ultrasonic, electromagnetic) profiling metallic engines.