Effect of PWHT cycles on fatigue crack growth and toughness of quenched and tempered pressure vessel steels
Transportable pressure vessels, commonly manufactured from quenched and tempered (QT) steels, require mandatory postweld heat treatment (PWHT) regardless of plate thickness. During their life, transportable pressure vessels may have up to 4 PWHT cycles at temperatures between 540 and 590 °C, and con...
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Published in | Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 391; no. 1; pp. 256 - 263 |
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Main Authors | , , , |
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Language | English |
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Amsterdam
Elsevier B.V
25.01.2005
Elsevier |
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Abstract | Transportable pressure vessels, commonly manufactured from quenched and tempered (QT) steels, require mandatory postweld heat treatment (PWHT) regardless of plate thickness. During their life, transportable pressure vessels may have up to 4 PWHT cycles at temperatures between 540 and 590
°C, and concerns have emerged about possible effects on the mechanical properties of the base (parent) plate.
This paper reports work on the resistance to fatigue crack growth, impact toughness and CTOD fracture toughness of two types of QT steels. The parent metal region was examined for both steels, and then exposed to temperatures and times in the PWHT range. Although there was a marginal decrease in the resistance to fatigue crack growth for up to four postweld heat treatment cycles, there was a significant decrease in impact toughness and CTOD fracture toughness. |
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AbstractList | Transportable pressure vessels, commonly manufactured from quenched and tempered (QT) steels, require mandatory postweld heat treatment (PWHT) regardless of plate thickness. During their life, transportable pressure vessels may have up to 4 PWHT cycles at temperatures between 540 and 590 deg C, and concerns have emerged about possible effects on the mechanical properties of the base (parent) plate. This paper reports work on the resistance to fatigue crack growth, impact toughness and CTOD fracture toughness of two types of QT steels. The parent metal region was examined for both steels, and then exposed to temperatures and times in the PWHT range. Although there was a marginal decrease in the resistance to fatigue crack growth for up to four postweld heat treatment cycles, there was a significant decrease in impact toughness and CTOD fracture toughness. Transportable pressure vessels, commonly manufactured from quenched and tempered (QT) steels, require mandatory postweld heat treatment (PWHT) regardless of plate thickness. During their life, transportable pressure vessels may have up to 4 PWHT cycles at temperatures between 540 and 590 °C, and concerns have emerged about possible effects on the mechanical properties of the base (parent) plate. This paper reports work on the resistance to fatigue crack growth, impact toughness and CTOD fracture toughness of two types of QT steels. The parent metal region was examined for both steels, and then exposed to temperatures and times in the PWHT range. Although there was a marginal decrease in the resistance to fatigue crack growth for up to four postweld heat treatment cycles, there was a significant decrease in impact toughness and CTOD fracture toughness. |
Author | Carr, D.G. Sterjovski, Z. Dunne, D.P. Ambrose, S. |
Author_xml | – sequence: 1 givenname: Z. surname: Sterjovski fullname: Sterjovski, Z. email: zoran@uow.edu.au organization: Faculty of Engineering, University of Wollongong, Northfields Avenue, NSW 2522, Australia – sequence: 2 givenname: D.G. surname: Carr fullname: Carr, D.G. organization: Materials Division, Australian Nuclear Science and Technology Organisation, PMB 1, Menai 2234, Australia – sequence: 3 givenname: D.P. surname: Dunne fullname: Dunne, D.P. organization: Faculty of Engineering, University of Wollongong, Northfields Avenue, NSW 2522, Australia – sequence: 4 givenname: S. surname: Ambrose fullname: Ambrose, S. organization: Welding Technology Institute of Australia (WTIA), Silverwater, NSW 2128, Australia |
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Cites_doi | 10.1007/BF02833356 10.1361/105994901770345213 10.1007/BF02661759 10.1007/BF02663866 10.1016/0308-0161(90)90033-E 10.1023/A:1021806127577 10.1007/BF02643348 |
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Keywords | Fatigue crack growth Transportable pressure vessels Void coalescence CTOD Impact toughness Postweld heat treatment Quenched and tempered steel Heat treatment Thermal cycle Pressure vessel Steel Crack propagation resistance Fatigue crack Crack propagation Weld Fracture toughness Thickness Tempering Microstructure |
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Snippet | Transportable pressure vessels, commonly manufactured from quenched and tempered (QT) steels, require mandatory postweld heat treatment (PWHT) regardless of... |
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SubjectTerms | Applied sciences CTOD Exact sciences and technology Fatigue crack growth Fractures Impact toughness Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy Postweld heat treatment Quenched and tempered steel Transportable pressure vessels Void coalescence |
Title | Effect of PWHT cycles on fatigue crack growth and toughness of quenched and tempered pressure vessel steels |
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