Evolution of microstructure in a nickel-based superalloy as a function of ageing time

E-Wen Huang; Yun Liu; Yang Ren; Lionel Porcar; Ji Jung Kai; Peter K. Liaw; Gregory S. Smith; Wei Ren Chen

doi:10.1080/09500839.2011.587463

Evolution of microstructure in a nickel-based superalloy as a function of ageing time

E-Wen Huang^*, Yun Liu, Yang Ren, Lionel Porcar, Ji Jung Kai, Peter K. Liaw, Gregory S. Smith, Wei Ren Chen

^*Corresponding author for this work

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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 monotonically growth stage. Possible reasons for this observed structural evolution, which is predicted thermodynamically, are suggested.

Original language	English
Pages (from-to)	483-490
Number of pages	8
Journal	Philosophical Magazine Letters
Volume	91
Issue number	7
DOIs	https://doi.org/10.1080/09500839.2011.587463
State	Published - 1 Jul 2011

Keywords

ageing
nickel alloys
precipitation
small-angle neutron scattering
synchrotron radiation

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AU - Huang, E-Wen

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AU - Ren, Yang

AU - Porcar, Lionel

AU - Kai, Ji Jung

AU - Liaw, Peter K.

AU - Smith, Gregory S.

AU - Chen, Wei Ren

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AB - 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 monotonically growth stage. Possible reasons for this observed structural evolution, which is predicted thermodynamically, are suggested.

KW - ageing

KW - nickel alloys

KW - precipitation

KW - small-angle neutron scattering

KW - synchrotron radiation

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Evolution of microstructure in a nickel-based superalloy as a function of ageing time

Abstract

Keywords

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