Case Study: Failure Investigation Report of IMI 550 High-Pressure Compressor (HPC-I) Aero Engine Blade*
The failed sample was seen in the SEM for a detailed observation of the fracture surface. The apparent origin of the fracture observed at low magnification is shown in Figure 9.2. The same is shown at higher magnification in Figure 9.4. The origin appeared to be associated with machining grooves, as seen Figure 9.4b. A prominent beach mark was observed on the fracture surface (Figure 9.5).