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On the dwell-fatigue crack propagation behavior of a high strength superalloy manufactured by electron beam melting
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-8304-0221
2019 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 760, p. 448-457Article in journal (Refereed) Published
Abstract [en]

To demonstrate the reliability of additively manufactured superalloys for critical turbine engine components, dynamic tests simulating in-service condition are required. The present study aims to study the dwell-fatigue crack propagation behaviors of IN718 manufactured via electron beam melting (EBM). The textured and columnar-grained microstructure of EBM IN718 shows anisotropic dwell-fatigue cracking resistance when loading axis is aligned parallel and perpendicular to the columnar grains. High and low angle grain boundaries interact differently with the dwell-fatigue cracking path. The effect of different heat treatments on the cracking behavior is also discussed. The dwell-fatigue crack propagation rate of EBM IN718 is compared with forged IN718 under both dwell-fatigue test condition and pure fatigue test condition. The superiority of dwell-fatigue cracking resistance of EBM IN718 to forged IN718 is shown and discussed.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2019. Vol. 760, p. 448-457
Keywords [en]
IN718; Electron beam melting (EBM); Dwell; Fatigue; Crack propagation
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-159148DOI: 10.1016/j.msea.2019.06.013ISI: 000474501200044OAI: oai:DiVA.org:liu-159148DiVA, id: diva2:1339657
Note

Funding Agencies|Sandvik Machining Solutions AB in Sandviken, Sweden; Chinese Scholarship Council; Swedish Governmental Agency for Innovation Systems (Vinnova) [2016-05175]; Faculty grant SFO-MAT-LiU at Linkoping University [2009-00971]; Agora Materiae

Available from: 2019-07-30 Created: 2019-07-30 Last updated: 2019-07-30

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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  • Other style
More styles
Language
  • de-DE
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  • nn-NB
  • sv-SE
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