2009•Cailiao gongchengRequires access

Failure Analysis of ZM6 Engine Box

Tao Jiang

Abstract

A crack was founded in an engine box of an aeroplane during fatigue test by fluorescence penetrate testing.According to the results of macroscopical testing,fractography analysis,chemical analysis,hardness testing and metallographic analysis,it is concluded that the fracture model is low cycle fatigue,Nd segregation of the surface results in the fatigue fracture of the engine box and low material toughness promots the extending of the crack.Based on the analysis results,some measures are brought forward to avoiding the failure of the engine box.

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Key concepts: Fractography, Fatigue testing, Materials science, Fracture toughness, Fracture (geology), Low-cycle fatigue, Structural engineering, Forensic engineering