Tuning Strain Localization in Polycrystalline Nickel-Based Superalloys by Thermomechanical Processing

M. A. Charpagne, J. C. Stinville, A. T. Polonsky, M. P. Echlin, S. P. Murray, Z. Chen, N. Bozzolo, J. Cormier, V. Valle, T. M. Pollock

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


Thermomechanical processing routes are used to produce microstructures that minimize plastic strain localization at the sub-grain scale in a polycrystalline γ- γ’ nickel-based superalloy. This novel approach is made possible by the use of innovative experimental tools and statistical data analysis that capture slip events over large representative fields of view. Results are correlated to conventional observations of fatigue crack initiation and early stage of propagation. The effect of coherent twin boundaries and primary γ precipitates on fatigue properties and plastic localization is detailed.

Original languageEnglish (US)
Title of host publicationSuperalloys 2020 - Proceedings of the 14th International Symposium on Superalloys
EditorsSammy Tin, Mark Hardy, Justin Clews, Jonathan Cormier, Qiang Feng, John Marcin, Chris O'Brien, Akane Suzuki
Number of pages11
ISBN (Print)9783030518332
StatePublished - 2020
Externally publishedYes
Event14th International Symposium on Superalloys, Superalloys 2021 - Seven Springs, United States
Duration: Sep 12 2021Sep 16 2021

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696


Conference14th International Symposium on Superalloys, Superalloys 2021
Country/TerritoryUnited States
CitySeven Springs


  • 3D microstructure
  • Annealing twin boundaries
  • Nickel-based superalloy
  • Primary precipitates
  • Slip bands

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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