Precipitation model validation in 3RD generation aeroturbine disc alloys

G. B. Olson; H. J. Jou; J. Jung; J. T. Sebastian; A. Misra; I. Locci; D. Hull

doi:10.7449/2008/superalloys_2008_923_932

Precipitation model validation in 3^RD generation aeroturbine disc alloys

G. B. Olson, H. J. Jou, J. Jung, J. T. Sebastian, A. Misra, I. Locci, D. Hull

Materials Science and Engineering

Research output: Contribution to conference › Paper › peer-review

46 Scopus citations

Abstract

In support of application of the DARPA-AIM methodology to the accelerated hybrid thermal process optimization of 3^rd generation aeroturbine disc alloys with quantified uncertainty, equilibrium and diffusion couple experiments have identified available fundamental thermodynamic and mobility databases of sufficient accuracy. Using coherent interfacial energies quantified by Single-Sensor DTA nucleation undercooling measurements, PrecipiCalc™ simulations of nonisothermal precipitation in both supersolvus and subsolvus treated samples show good agreement with measured γ' particle sizes and compositions. Observed longterm isothermal coarsening behavior defines requirements for further refinement of elastic misfit energy and treatment of the parallel evolution of incoherent precipitation at grain boundaries.

Original language	English (US)
Pages	923-932
Number of pages	10
DOIs	https://doi.org/10.7449/2008/superalloys_2008_923_932
State	Published - 2008
Event	11th International Symposium on Superalloys, Superalloys 2008 - Champion, PA, United States Duration: Sep 14 2008 → Sep 18 2008

Other

Other	11th International Symposium on Superalloys, Superalloys 2008
Country/Territory	United States
City	Champion, PA
Period	9/14/08 → 9/18/08

Keywords

CALPHAD
Diffusion
Modeling
Nickel-based superalloys
Precipitation
Thermodynamics

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

Access to Document

10.7449/2008/superalloys_2008_923_932

Cite this

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title = "Precipitation model validation in 3RD generation aeroturbine disc alloys",

abstract = "In support of application of the DARPA-AIM methodology to the accelerated hybrid thermal process optimization of 3rd generation aeroturbine disc alloys with quantified uncertainty, equilibrium and diffusion couple experiments have identified available fundamental thermodynamic and mobility databases of sufficient accuracy. Using coherent interfacial energies quantified by Single-Sensor DTA nucleation undercooling measurements, PrecipiCalc{\texttrademark} simulations of nonisothermal precipitation in both supersolvus and subsolvus treated samples show good agreement with measured γ' particle sizes and compositions. Observed longterm isothermal coarsening behavior defines requirements for further refinement of elastic misfit energy and treatment of the parallel evolution of incoherent precipitation at grain boundaries.",

keywords = "CALPHAD, Diffusion, Modeling, Nickel-based superalloys, Precipitation, Thermodynamics",

author = "Olson, {G. B.} and Jou, {H. J.} and J. Jung and Sebastian, {J. T.} and A. Misra and I. Locci and D. Hull",

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AU - Olson, G. B.

AU - Jou, H. J.

AU - Jung, J.

AU - Sebastian, J. T.

AU - Misra, A.

AU - Locci, I.

AU - Hull, D.

PY - 2008

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AB - In support of application of the DARPA-AIM methodology to the accelerated hybrid thermal process optimization of 3rd generation aeroturbine disc alloys with quantified uncertainty, equilibrium and diffusion couple experiments have identified available fundamental thermodynamic and mobility databases of sufficient accuracy. Using coherent interfacial energies quantified by Single-Sensor DTA nucleation undercooling measurements, PrecipiCalc™ simulations of nonisothermal precipitation in both supersolvus and subsolvus treated samples show good agreement with measured γ' particle sizes and compositions. Observed longterm isothermal coarsening behavior defines requirements for further refinement of elastic misfit energy and treatment of the parallel evolution of incoherent precipitation at grain boundaries.

KW - CALPHAD

KW - Diffusion

KW - Modeling

KW - Nickel-based superalloys

KW - Precipitation

KW - Thermodynamics

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