Wednesday, January 21, 2015

Corrosion fatigue enhancement of welded steel pipes by ultrasonic impact treatment



Type
Journal Article
Author
M. Daavari
Author
S. A. Sadough Vanini
URL
Volume
139
Pages
462-466
Publication
Materials Letters
Date
January 15, 2015
Abstract
Corrosion fatigue refers to the process in which a metal fractures prematurely under condition of simultaneous corrosion and repeated cyclic loading. Tensile residual stresses caused by certain manufacturing processes are the main causes of decreased structural life of structures under cyclic loading and corrosive environments.
Applying ultrasonic impact treatment is an effective method for enhancing fatigue behavior of materials. On the other hand, it has some positive effects on corrosion resistance of metals. Researchers studied the effect of ultrasonic impact treatment on corrosion fatigue behavior of A106-B welded steel pipe, provided by gas refinery. They found that enhanced corrosion fatigue life can be achieved by application of ultrasonic impact treatment.

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