April 2012

Journal

Evolution of Microstructure in a Nickel-based Superalloy as a Function of Ageing Time

By:
Chen, Wei-Ren ; Smith, Gregory S; Porcar, L.; Liaw, Peter; Kai, Ji-Jung ; Ren, Y.
Journal Name:
Philosophical Magazine Letters
Page Number:
483-490
Volume:
91
Issue Number:
7
Publication Date:
April 2012
View DOI Listing:
https://doi.org/10.1080/09500839.2011.587463

Abstract

An experimental investigation, combining synchrotron X-ray powder diffraction, small-angle neutron-scattering, and transmission electron microscopy, has been undertaken to study the microstructure of nanoprecipitates in a nickel-based superalloy. Upon increasing the ageing time during a heat-treatment process, the average size of the precipitates first decreases before changing to a monotonical growth stage. Possible reasons for this observed structural evolution, which is predicted thermodynamically, are suggested.


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