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Modeling of Forming and Welding in Alloy 718
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials. Swerea IVF AB. (Solid Mechanics)ORCID iD: 0000-0002-1432-444X
2017 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2017.
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Keyword [en]
Forming, welding, Alloy 718, damage, GISSMO, failure
National Category
Applied Mechanics Metallurgy and Metallic Materials
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-62901ISBN: 978-91-7583-870-0 (print)ISBN: 978-91-7583-871-7 (electronic)OAI: oai:DiVA.org:ltu-62901DiVA: diva2:1087064
Presentation
, Luleå (English)
Supervisors
Projects
Virtuell processkedja för plåtformade flygmotorstrukturer i superlegeringar – Validering och demonstrator
Funder
VINNOVA, 2013-01173
Available from: 2017-04-06 Created: 2017-04-05 Last updated: 2017-04-06Bibliographically approved
List of papers
1. Calibration of a damage and fracture model for alloy 718
Open this publication in new window or tab >>Calibration of a damage and fracture model for alloy 718
2016 (English)In: Advancements in Theoretical and Applied Plasticity: Proceedings of PLASTICITY ’16: The Twenty Second International Symposium on Plasticity and its Current Applications / [ed] Akhtar S. Khan, Fulton, Maryland 20759-0591, USA: NEAT PRESS , 2016, 223-225 p.Conference paper (Refereed)
Abstract [en]

Nickel-based superalloys are primarily used in the hot sections of aircraft engines because they can maintain their mechanical properties and chemical stabilities at high temperatures under severe corrosive environments i.e. for a long time. In order to simulate forming procedures in Alloy 718 sheets, the GISSMO damage and failure model is coupled with both isotropic von Mises and anisotropic Barlat YLD2000 material models in the finite element code LS-DYNA. In this study, the calibration of the GISSMO model for forming simulations at room temperature is discussed. The calibration requires failure strains for different stress states as a function of triaxiality, which are obtained by testing six different specimen geometries up to fracture. Numerical predictions will be compared with experimental observations from forming tests.

Place, publisher, year, edition, pages
Fulton, Maryland 20759-0591, USA: NEAT PRESS, 2016
Keyword
damage, fracture, nickel-based superalloys, Alloy 718, forming, GISSMO
National Category
Metallurgy and Metallic Materials Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-62818 (URN)978-0-9911654-7-6 (ISBN)
Conference
22nd International Symposium on Plasticity and Its Current Applications, (Plasticity 2016), Kona, Hawaii, January 3-9, 2016
Projects
NFFP6 - Virtuell processkedja för plåtformade flygmotorstrukturer i superlegeringar – Validering och demonstrator
Funder
VINNOVA, 2013-01173
Available from: 2017-04-05 Created: 2017-04-05 Last updated: 2017-04-11Bibliographically approved
2. Damage and fracture during sheet metal forming in Alloy 718
Open this publication in new window or tab >>Damage and fracture during sheet metal forming in Alloy 718
2017 (English)In: International journal of plasticity, ISSN 0749-6419, E-ISSN 1879-2154Article in journal (Refereed) Submitted
Place, publisher, year, edition, pages
Elsevier, 2017
Keyword
fracture, damage, GISSMO, forming, nickel-based superalloys, Alloy 718
National Category
Metallurgy and Metallic Materials Applied Mechanics
Research subject
Solid Mechanics
Identifiers
urn:nbn:se:ltu:diva-62903 (URN)
Projects
Virtuell processkedja för plåtformade flygmotorstrukturer i superlegeringar – Validering och demonstrator
Funder
VINNOVA, 2013-01173
Available from: 2017-04-05 Created: 2017-04-05 Last updated: 2017-04-11

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