Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Simulation of weld solidifiation cracking in varestraint tests of alloy 718
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-2197-6243
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-7298-020x
University West, 46132 Trollhättan, Sweden.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-2544-9168
2019 (English)In: Mathematical Modelling of Weld Phenomena 12: Selected peer reviewed papers from the 12th International Seminar Numerical Analysis of Weldability / [ed] C. Sommitsch, N. Enzinger, P. Mayr, Gratz, 2019, p. 485-504Conference paper, Published paper (Refereed)
Abstract [en]

Several nickel-based superalloys are susceptible to weld solidification cracking. Numerical simulation can be a powerful tool for optimizing the welding process such that solidification cracking can be avoided. In order to simulate the cracking, a crack model inspired by the RDG model is proposed. The model is based on a crack criterion that estimates the likelihood for a preexisting pore in a grain boundary liquid film to form a crack. The criterion depends on the thickness and the liquid pressure in the grain boundary liquid film, as well as the surface tension of the pore. The thickness of the liquid film is computed from the macroscopic mechanical strain field of an FE model with a double ellipsoidal heat source. A temperature-dependent length scale is used to partition the macroscopic strain to the liquid film. The liquid pressure in the film is evaluated using a combination of Poiseuille parallel plate flow and Darcy’s law for porous flows. The Poiseuille flow is used for the part of the grain boundary liquid film that extends into the region with liquid fraction less than 0.1, while Darcy’s law is used for the rest of the liquid film that extends into the regions with liquid fraction greater than 0.1. The proposed model was calibrated and evaluated in Varestraint tests of Alloy 718. Crack location, width, and orientation were all accurately predicted by the model.

Place, publisher, year, edition, pages
Gratz, 2019. p. 485-504
Series
Mathematical Modelling of Weld Phenomena, ISSN 2410-0544 ; 12
Keywords [en]
Solidification cracking, Hot cracking, Varestraint testing, Computational Welding Mechanics, Alloy 718
National Category
Other Materials Engineering
Research subject
Material Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-75740DOI: 10.3217/978-3-85125-615-4-26OAI: oai:DiVA.org:ltu-75740DiVA, id: diva2:1346808
Conference
12th International Seminar 'Numerical Analysis of Weldability', 23-26 September, 2018, Graz, Austria
Note

ISBN för värdpublikation: 978-3-85125-615-4, 978-3-85125-616-1

Available from: 2019-08-29 Created: 2019-08-29 Last updated: 2023-09-05Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records

Draxler, JoarEdberg, JonasLindgren, Lars-Erik

Search in DiVA

By author/editor
Draxler, JoarEdberg, JonasLindgren, Lars-Erik
By organisation
Mechanics of Solid Materials
Other Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 75 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf