journal article·2019-01-01

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

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Abstract

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.
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Research context

OpenAlex topics: High Temperature Alloys and Creep · Intermetallics and Advanced Alloy Properties · Microstructure and mechanical properties

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Affiliations

GE Global Research, Bangalore 560066, India

GE-Aviation, Cincinnati, OH 45069

GE-Power, Greenville, SC 29615

GE-Power, Bangalore 560066, India

BHGE, Florence 50127, Italy

References (15)

Show source-provided references
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