EFFECT OF ULTRASONIC IMPACT TREATMENT ON FATIGUE BEHAVIOR OF STEEL WELDED PIPES IN PETROCHEMICAL CORROSIVE ENVIRONMENT

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DAVARI M.; SADOUGH VANINI S.A.; ASHOURI GH.A.

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Journal: JOURNAL OF NEW MATERIALS Year:2015 | Volume:6 | Issue:1 (21) Page(s): 83-95

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Title

EFFECT OF ULTRASONIC IMPACT TREATMENT ON FATIGUE BEHAVIOR OF STEEL WELDED PIPES IN PETROCHEMICAL CORROSIVE ENVIRONMENT

Author(s)

DAVARI M. | SADOUGH VANINI S.A. | ASHOURI GH.A. | Issue Writer Certificate

Keywords

CORROSION FATIGUE LIFEQ2

SMAW BUTT WELDED JOINTSQ2

ULTRASONIC IMPACT TREATMENTQ2

A106-B STEEL PIPESQ2

Abstract

Fatigue failure analysis is one of the most important issues in different industries such as oil, gas, and petrochemical. On the other hand welding operation is a prevalent and inevitable method for connecting elements and components. Because of presence of inherent defects in these welded joints, fatigue cracks originate and propagate, and failures occur in these zones more than others. Weld toe region is one of the crack and fracture source in welded structures due to stress concentrations and high residual stresses zones. Different methods can be used to improve mechanical behavior of welded structures; such as: peening, dressing and grinding methods, which are known as post weld treatments. ULTRASONIC IMPACT TREATMENT is one of the modern and promising technologies which can enhance fatigue behavior of structures by residual stress and geometry effects. It also has some positive effects on corrosion resistance of metals. In this paper, effect of ULTRASONIC IMPACT TREATMENT on CORROSION FATIGUE LIFE of A106-B carbon steel pipes has been investigated. Evaluation of effect of this post- weld treatment bymicro- hardness test, residual stresses analysis, and weld geometry measurement have been studied as supplementary tests. Improvement in fatigue life due to ULTRASONIC IMPACT TREATMENT was 99.4 percent. Also fatigue strength has increased by 19.8 percent at 20000 cycles.

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APA: Copy

DAVARI, M., SADOUGH VANINI, S.A., & ASHOURI, GH.A.. (2015). EFFECT OF ULTRASONIC IMPACT TREATMENT ON FATIGUE BEHAVIOR OF STEEL WELDED PIPES IN PETROCHEMICAL CORROSIVE ENVIRONMENT. JOURNAL OF NEW MATERIALS, 6(1 (21)), 83-95. SID. https://sid.ir/paper/169697/en

Vancouver: Copy

DAVARI M., SADOUGH VANINI S.A., ASHOURI GH.A.. EFFECT OF ULTRASONIC IMPACT TREATMENT ON FATIGUE BEHAVIOR OF STEEL WELDED PIPES IN PETROCHEMICAL CORROSIVE ENVIRONMENT. JOURNAL OF NEW MATERIALS[Internet]. 2015;6(1 (21)):83-95. Available from: https://sid.ir/paper/169697/en

IEEE: Copy

M. DAVARI, S.A. SADOUGH VANINI, and GH.A. ASHOURI, “EFFECT OF ULTRASONIC IMPACT TREATMENT ON FATIGUE BEHAVIOR OF STEEL WELDED PIPES IN PETROCHEMICAL CORROSIVE ENVIRONMENT,” JOURNAL OF NEW MATERIALS, vol. 6, no. 1 (21), pp. 83–95, 2015, [Online]. Available: https://sid.ir/paper/169697/en

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