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ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
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ASM International
Volume
1
ISBN electronic:
978-1-62708-214-3
Publication date:
1992
Book Chapter

Failure of a Flexible Pump Connector

By
Carmine D'Antonio
Carmine D'Antonio
Department of Metallurgy and Materials Science, Polytechnic University
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Published:
1992
Page range:
295 - 296

Abstract

A stainless steel flexible connector failed after a short period of service. Visual examination of the failed part revealed that a fracture had occurred in the thin-walled stainless steel bellows brazed into the flanges at each end. Surface examination by SEM fractography showed that failure of the bellows occurred via fatigue. The crack in the bellows had widened considerably after the fracture, and the bellows had been severely compressed on the fracture side prior to failure. Based on these observations, it was concluded that bellows had been damaged prior to installation. The damage resulted in high mean tensile stresses upon which were superimposed cyclic stresses, with fatigue failure the final result.

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Carmine D'Antonio, 1992. "Failure of a Flexible Pump Connector", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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