Failure analysis of hook end self locking nuts of an aero-engine

Engineering Failure Analysis（2020）

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摘要

•Repeated premature failure of hook end self locking nuts of gas-turbine engine.•Component manufactured from GTM Su 718, a nickel based super alloy.•Brittle intergranular failure of the hook end self locking nuts.•Hydrogen embrittlement was the root cause of failure.

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关键词

GTM Su 718,Intergranular fracture,Hydrogen embrittlement,Electroplating,De-embrittlement treatment

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