Fracture Analysis of Connecting Nut for Inlet Flushing Valve

DENG Jianqing;WANG Mingzheng;LIU Shengying;WANG Tongbo

Physics Examination and Testing ›› 2008, Vol. 26 ›› Issue (2) : 55-0.

Physics Examination and Testing ›› 2008, Vol. 26 ›› Issue (2) : 55-0.
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Fracture Analysis of Connecting Nut for Inlet Flushing Valve

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Abstract

The longitudinal fracture arosed in connecting nut for inlet flushing valve. The fracture analysis was made by means of microstructure, macrostructure, SEM, chemical composition, stress measurement and calculation. Experiment results showed that the fracture of the nut was originated from a variety of macro defects, micro defects both by founding and machining, as well as high residual stress.

Key words

connecting nut / fracture / failure analysis / residual stress.

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DENG Jianqing, WANG Mingzheng, LIU Shengying, et al. Fracture Analysis of Connecting Nut for Inlet Flushing Valve[J]. Physics Examination and Testing, 2008, 26(2): 55-0

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