Effect of non-metallic ceramic inclusions on strain localization during low cycle fatigue of a polycrystalline superalloy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The presence of inclusions in powder metallurgical processed disk materials often leads to competing failure modes and a wide variability in fatigue durability in low cycle fatigue. For robust models for fatigue and prediction of the variability in this property, the impact of such inclusions on the fatigue crack initiation process has been studied. Fatigue experiments in the low cycle fatigue regime on an intentionally seeded René 88DT polycrystalline nickel-base superalloy were performed at 400 °C and 650 °C to evaluate the effect of non-metallic ceramic inclusions on the strain distribution and fatigue initiation process. Advanced high resolution digital image correlation measurements were performed to related strain fields at the grain scale to microstructure surrounding non-metallic inclusions.

Original languageEnglish (US)
Title of host publicationSUPERALLOYS 2016 - Proceedings of the 13th International Symposium on Superalloys
EditorsMark Hardy, Eric Huron, Uwe Glatzel, Brian Griffin, Beth Lewis, Cathie Rae, Venkat Seetharaman, Sammy Tin
PublisherMinerals, Metals and Materials Society
Pages897-905
Number of pages9
ISBN (Electronic)9781118996669
DOIs
StatePublished - 2016
Externally publishedYes
Event13th International Symposium on Superalloys, SUPERALLOYS 2016 - Seven Springs, United States
Duration: Sep 11 2016Sep 15 2016

Publication series

NameProceedings of the International Symposium on Superalloys
Volume2016-January

Conference

Conference13th International Symposium on Superalloys, SUPERALLOYS 2016
Country/TerritoryUnited States
CitySeven Springs
Period9/11/169/15/16

Keywords

  • High resolution scanning electron microscope digital image correlation
  • Low cycle fatigue
  • Nonmetallic ceramic inclusion
  • René 88DT nickel-base superalloy

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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