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Modeling and simula...
Modeling and simulation of weld solidification cracking part II : A model for estimation of grain boundary liquid pressure in a columnar dendritic microstructure
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- Draxler, Joar (author)
- Luleå tekniska universitet,Material- och solidmekanik,Luleå University of Technology, Luleå, 97187, Sweden
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- Edberg, Jonas (author)
- Luleå tekniska universitet,Material- och solidmekanik,Luleå University of Technology, Luleå, 97187, Sweden
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- Andersson, Joel, 1981- (author)
- Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW PRIMUS,University West, Trollhättan, Sweden
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- Lindgren, Lars-Erik (author)
- Luleå tekniska universitet,Material- och solidmekanik,Luleå University of Technology, Luleå, 97187, Sweden
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(creator_code:org_t)
- 2019-06-21
- 2019
- English.
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In: Welding in the World. - : Springer Science and Business Media LLC. - 0043-2288 .- 1878-6669. ; 63:5, s. 1503-1519
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Abstract
Subject headings
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- Several advanced alloy systems are susceptible to weld solidification cracking. One example is nickel-based superalloys, which are commonly used in critical applications such as aerospace engines and nuclear power plants. Weld solidification cracking is often expensive to repair, and if not repaired, can lead to catastrophic failure. This study, presented in three papers, presents an approach for simulating weld solidification cracking applicable to large-scale components. The results from finite element simulation of welding are post-processed and combined with models of metallurgy, as well as the behavior of the liquid film between the grain boundaries, in order to estimate the risk of crack initiation. The first paper in this study describes the crack criterion for crack initiation in a grain boundary liquid film. The second paper describes the model for computing the pressure and the thickness of the grain boundary liquid film, which are required to evaluate the crack criterion in paper 1. The third and final paper describes the application of the model to Varestraint tests of Alloy 718. The derived model can fairly well predict crack locations, crack orientations, and crack widths for the Varestraint tests. The importance of liquid permeability and strain localization for the predicted crack susceptibility in Varestraint tests is shown. © 2019, The Author(s).
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
Keyword
- Crack initiation; Grain boundaries; Liquid films; Nickel alloys; Nuclear fuels; Nuclear power plants; Paper; Risk perception; Solidification; Welding; Welds
- Alloy 718; Crack susceptibilities; Critical applications; Dendritic microstructure; Finite element simulations; Hot cracking; Nickel- based superalloys; Solidification cracking
- Cracks
- Manufacturing and materials engineering
- Produktions- och materialteknik
- Production Technology
- Produktionsteknik
- Material Mechanics
Publication and Content Type
- ref (subject category)
- art (subject category)
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