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Crack initiation prediction of additive manufactured ductile nickel-based superalloys
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering. Siemens Ind Turbomachinery AB, Sweden.
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering.
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2018 (English)In: 12TH INTERNATIONAL FATIGUE CONGRESS (FATIGUE 2018), E D P SCIENCES , 2018, Vol. 165, article id 04013Conference paper, Published paper (Refereed)
Abstract [en]

A model to predict crack initiation life of an additive manufactured nickel-based superalloy similar to Hastelloy X subjected to low-cycle fatigue loading at room temperature has been developed, taking material anisotropy into account. An anisotropic constitutive model based on the Hill yield criterion was developed, with linear kinematic hardening up to a saturation value of the back stress, above which the material behaves perfectly plastic. Low-cycle fatigue experiments has been performed on additive manufactured smooth bars with two different build orientations, with an angle of 0 degrees and 90 degrees relative to the building platform. A total of 20 experiments at room temperature were conducted with different strain ranges and R-values. To predict the crack initiation life of the specimens, a model based on the Smith-Watson-Topper (SWT) parameter has been established, where ten of the specimens were used to calibrate the initiation model, and the remaining specimens were used for validation. Using this model, the obtained crack initiation life agrees well with the experiments.

Place, publisher, year, edition, pages
E D P SCIENCES , 2018. Vol. 165, article id 04013
Series
MATEC Web of Conferences, ISSN 2261-236X
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:liu:diva-159904DOI: 10.1051/matecconf/201816504013ISI: 000478990600043OAI: oai:DiVA.org:liu-159904DiVA, id: diva2:1346105
Conference
12th International Fatigue Congress (FATIGUE)
Note

Funding Agencies|Swedish Energy Agency; Siemens Industrial Turbomachinery AB through "Turbines for Future Energy Systems" (Turbiner for framtidens energisy stem) [44112-1]

Available from: 2019-08-27 Created: 2019-08-27 Last updated: 2019-08-27

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Lindström, ThomasEriksson, RobertEwest, DanielSimonsson, KjellLeidermark, Daniel
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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