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Fatigue crack growth behaviour of Inconel 718 with high temperature hold times
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Hållfasthetslära. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
Volvo Aero Corporation.
Vise andre og tillknytning
2010 (engelsk)Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 2, nr 1, s. 1095-1104Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this work, fatigue crack growth measurements have been made on center-cracked tension specimens of Inconel 718, where the focus has been to observe the effect of high temperature hold times on the fatigue crack growth behaviour of the material. The material testing has been done at three different temperatures, namely 450 degrees C, 550 degrees C and 650 degrees C. All testing were done in an isothermal LCF context with a standard test method for measuring the fatigue crack growth rates.

sted, utgiver, år, opplag, sider
ELSEVIER SCIENCE BV , 2010. Vol. 2, nr 1, s. 1095-1104
Emneord [en]
nickel-base superalloys; fatigue crack propagation; Inconel 718
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-58352DOI: 10.1016/j.proeng.2010.03.118ISI: 000278762900116OAI: oai:DiVA.org:liu-58352DiVA, id: diva2:343348
Tilgjengelig fra: 2010-08-13 Laget: 2010-08-11 Sist oppdatert: 2017-12-12bibliografisk kontrollert
Inngår i avhandling
1. Constitutive and fatigue crack propagation behaviour of Inconel 718
Åpne denne publikasjonen i ny fane eller vindu >>Constitutive and fatigue crack propagation behaviour of Inconel 718
2010 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

In this licentiate thesis the work done in the TURBO POWER project Influence of high temperature hold times on the fatigue life of nickel-based superalloys will be presented. The overall objective of this project is to develop and evaluate tools for designing against fatigue in gas turbine applications, with special focus on the nickel-based superalloy Inconel 718. Firstly, the constitutive behaviour of the material has been been studied, where focus has been placed on trying to describe the mean stress relaxation and initial softening of the material under intermediate temperatures. Secondly, the fatigue crack propagation behaviour under high temperature hold times has been studied. Focus has here been placed on investigating the main fatigue crack propagation phenomena with the aim of setting up a basis for fatigue crack propagation modelling.

This thesis is divided into two parts. The first part describes the general framework, including basic constitutive and fatigue crack propagation behaviour as well as a theoretical background for the constitutive modelling of mean stress relaxation. This framework is then used in the second part, which consists of the four included papers.

sted, utgiver, år, opplag, sider
Linköping: Linköpings universitet, Electronisk Press, 2010. s. 38
Serie
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1461
Emneord
Nickel-base superalloys constitutive modelling mean stress relaxation fatigue crack propagation hold times grain boundary embrittlement
HSV kategori
Identifikatorer
urn:nbn:se:liu:diva-72610 (URN)LiU-TEK-LIC-2011:1 (Lokal ID)978-91-7393-258-5 (ISBN)LiU-TEK-LIC-2011:1 (Arkivnummer)LiU-TEK-LIC-2011:1 (OAI)
Presentation
2011-02-04, ACAS, Hus A, ingång 17, Campus Valla, Linköpings universitet, Linköping, 10:15 (svensk)
Opponent
Veileder
Tilgjengelig fra: 2011-12-05 Laget: 2011-11-30 Sist oppdatert: 2020-03-10bibliografisk kontrollert
2. High temperature fatigue crack propagation behaviour of Inconel 718
Åpne denne publikasjonen i ny fane eller vindu >>High temperature fatigue crack propagation behaviour of Inconel 718
2013 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

The overall objective of this work has been to develop and evaluate tools for designing against fatigue in gas turbine applications, with special focus on the nickel-based superalloy Inconel 718. The fatigue crack propagation behaviour under high temperature hold times has been studied. Firstly, the main fatigue crack propagation phenomena have been investigated with the aim of setting up a basis for fatigue crack propagation modelling. Secondly, modelling of the observed behaviour has been performed. Finally, the constitutive behaviour of the material has been studied, where focus has been placed on trying to describe the mean stress relaxation and initial softening of the material under intermediate temperatures.

This thesis is divided into two parts. The first part describes the general framework, including basic observed fatigue crack propagation behaviour of the material when subjected to hold times at high temperature as well as a background for the constitutive modelling of mean stress relaxation. This framework is then used in the second part, which consists of the seven included papers.

sted, utgiver, år, opplag, sider
Linköping: Linköping University Electronic Press, 2013. s. 37
Serie
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1487
HSV kategori
Identifikatorer
urn:nbn:se:liu:diva-85934 (URN)978-91-7519-750-0 (ISBN)
Disputas
2013-02-01, C3, Hus C, Campus Valla, Linköpings universitet, Linköping, 10:15 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2012-12-03 Laget: 2012-12-03 Sist oppdatert: 2019-12-03bibliografisk kontrollert

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