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

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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 - Jul 2011

Funding

The work presented in this article could not have been made without the input made from the US National Science Foundation (NSF) projects of CMMI-0900271 and DMR-0909037 with Dr C. Huber, Dr D. Finotello, Dr C.V. Cooper and Dr A. Ardell as program directors. We acknowledge the ORNL–LDRD program (project no. 05272). E-Wen Huang and Ji-Jung Kai appreciate the support from the National Science Council Programs of NSC-99-3113-Y-042-001. We acknowledge the support of The Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy for Oak Ridge National Laboratory’s High Flux Isotope Reactor. The support of the NIST US DOC in providing the neutron-research facilities supported under the NSF agreement of DMR-0454672 is acknowledged. The use of the Advanced Photon Source is supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract no. DE-AC02-06CH11357. We thank the Haynes International, Inc.1 for providing the materials.

Funders	Funder number
Scientific User Facilities Division
US Department of Energy for Oak Ridge National Laboratory’s High Flux Isotope Reactor
National Science Foundation	0900271
U.S. Department of Energy
National Institute of Standards and Technology	DMR-0454672
Office of Science	DE-AC02-06CH11357
Basic Energy Sciences
National Science Council	NSC-99-3113-Y-042-001

Keywords

ageing
nickel alloys
precipitation
small-angle neutron scattering
synchrotron radiation

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10.1080/09500839.2011.587463

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AU - Smith, Gregory S.

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

Abstract

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Keywords

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