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Hydrogen Embrittlement and Stress Corrosion Cracking

2018; Elsevier BV; Linguagem: Inglês

10.1016/b978-0-12-814336-0.00010-x

Kannadi Palankeezhe Balan,

Fatigue and fracture mechanics

The chapter initially gives a brief account of the causes, characteristics and preventive methods of hydrogen embrittlement and stress corrosion cracking of metallic materials. Four case studies of component failures are discussed that bring out a clear understanding of these problems in real time situations. The first case study is that of a fin mounting screw of an aero weapon that failed due to hydrogen embrittlement. The second case study is that of differential valve cover that had failed due to delayed cracking which was caused by a higher content of hydrogen in the alloy which was more than that is permissible. The third case is the stress corrosion cracking of the lever assembly of main under carriage of an aircraft. The fourth case study discusses the failure of cartridge seat ejection secondary of an aircraft due to stress corrosion cracking.