A microstructure-based model for creep of gamma prime strengthened nickel-based superalloys

Ramkumar Oruganti, Adarsh Shukla, Sachin Nalawade, Sanket Sarkar, K. G.V. Sivakumar, T. Vishwanath, Sanjay Sondhi, Andrew Wessman, Daniel Wei, Andrew Powell, Kenneth Bain, Jon Schaeffer, Arthur Peck, Michael Arnett, Girish Shastry, Francesco Mastromatteo

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


This paper outlines a microstructure-based model relating gamma prime microstructure and grain size of Ni-base alloys to their creep behavior. The ability of the model to explain creep of multiple superalloys with a single equation and parameter set is demonstrated. The only parameters that are changed from alloy to alloy are related to the gamma prime characteristics and grain size. This model also allows prediction of creep performance as a function of heat treatment and explains some apparently contradictory data from the literature.

Original languageEnglish (US)
Article number011001
JournalJournal of Engineering Materials and Technology, Transactions of the ASME
Issue number1
StatePublished - Jan 1 2019
Externally publishedYes


  • Continuum damage mechanics
  • Creep
  • Gamma prime
  • Model
  • Particle spacing
  • Superalloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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