Failure Analysis on Cracking of Buffer Accumulator End Cover

The cracking failure causes of an airplane buffer accumulator end cover were analyzed by means of macro-inspection, chemical components analysis, metallographic examination, fracture analysis and energy spectrum analysis combined with the parts’ practical situation analysis. The results show that the cracking of the end cover belonged to stress corrosion cracking which mainly caused by micro cracks on the forging surface and deposition of element chlorine.