Corrosion fatigue enhancement of welded steel pipes by ultrasonic impact treatment

Corrosion fatigue refers to the process in which a metal fractures prematurely under condition of simultaneous corrosion and repeated cyclic loading. Tensile residual stresses are caused by some manufacturing processes that are the main reasons of decreasing in life of structures under cyclic loadin...

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Bibliographic Details
Published in:Materials letters 2015-01, Vol.139, p.462-466
Main Authors: Daavari, M., Sadough Vanini, S.A.
Format: Article
Language:English
Subjects:
Corrosion fatigue
Cyclic loads
Fatigue (materials)
Fracture mechanics
Pipe
Refineries
Residual stress
Structural steels
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Summary:Corrosion fatigue refers to the process in which a metal fractures prematurely under condition of simultaneous corrosion and repeated cyclic loading. Tensile residual stresses are caused by some manufacturing processes that are the main reasons of decreasing in life of structures under cyclic loading and corrosive environments. Applying ultrasonic impact treatment is one of the promising and effective methods for enhancing fatigue behavior of materials. On the other hand, it has some positive effects on corrosion resistance of metals. In this work, effect of ultrasonic impact treatment on corrosion fatigue behavior of A106-B welded steel pipe, provided by gas refinery, has been investigated. It was demonstrated that more corrosion fatigue life can be achieved by application of ultrasonic impact treatment.
ISSN:0167-577X
DOI:10.1016/j.matlet.2014.10.141