Fatigue Failure Analysis of Pump Shaft of a Hydraulic Coke Removal System

Failure of pump shaft (P116-1) of high-pressure water pump occurred during coke removal. Shaft material (3Cr13) demonstrated yield and tensile strength of 737 and 910 MPa, respectively. Failure analysis was performed to determine the cause of failure, which was a fracture at the pump shaft located a...

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Bibliographic Details
Published in:Journal of failure analysis and prevention 2021-06, Vol.21 (3), p.861-869
Main Authors: Zhai, Jian-ming, Shang, Xue-xin, Kong, Ling-chen, Song, Ming, Wang, Han-kui, Xu, Tong, Yu, Hai-yang, Sun, Yong-hui
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemical composition
Chemistry and Materials Science
Chromium plating
Classical Mechanics
Coke
Corrosion and Coatings
Corrosion fatigue
Crack initiation
Crack propagation
Failure analysis
Fatigue cracks
Fatigue failure
Fatigue strength
Fracture mechanics
Materials Science
Quality Control
Reliability
Safety and Risk
Solid Mechanics
Technical Article > -Peer-Reviewed
Tensile strength
Tribology
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Summary:Failure of pump shaft (P116-1) of high-pressure water pump occurred during coke removal. Shaft material (3Cr13) demonstrated yield and tensile strength of 737 and 910 MPa, respectively. Failure analysis was performed to determine the cause of failure, which was a fracture at the pump shaft located at the journal. Macroscopic, metallographic, chemical composition, hardness, SEM, and EDS analyses were used in the failure analysis. Metallographic and SEM analyses revealed that fatigue cracks are related to corrosion and geometrical shape. Fatigue crack initiation at the disconnected area of the chromium plating layer weakened fatigue resistance. Causes of incomplete chromium plating at the shaft journal and keyway should be investigated further.
ISSN:1547-7029
1728-5674
1864-1245
DOI:10.1007/s11668-021-01124-8