Precipitation model validation in 3RD generation aeroturbine disc alloys

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

Research output: Contribution to conferencePaper

28 Citations (Scopus)

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™ 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 languageEnglish (US)
Pages923-932
Number of pages10
StatePublished - Dec 1 2008
Event11th International Symposium on Superalloys, Superalloys 2008 - Champion, PA, United States
Duration: Sep 14 2008Sep 18 2008

Other

Other11th International Symposium on Superalloys, Superalloys 2008
CountryUnited States
CityChampion, PA
Period9/14/089/18/08

Fingerprint

Undercooling
Coarsening
Interfacial energy
Differential thermal analysis
Grain boundaries
Nucleation
Particle size
Thermodynamics
interfacial energy
Sensors
supercooling
Chemical analysis
thermal analysis
grain boundaries
Experiments
nucleation
methodology
thermodynamics
requirements
optimization

Keywords

  • CALPHAD
  • Diffusion
  • Modeling
  • Nickel-based superalloys
  • Precipitation
  • Thermodynamics

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Olson, G. B., Jou, H. J., Jung, J., Sebastian, J. T., Misra, A., Locci, I., & Hull, D. (2008). Precipitation model validation in 3RD generation aeroturbine disc alloys. 923-932. Paper presented at 11th International Symposium on Superalloys, Superalloys 2008, Champion, PA, United States.
Olson, Gregory B ; Jou, H. J. ; Jung, J. ; Sebastian, J. T. ; Misra, A. ; Locci, I. ; Hull, D. / Precipitation model validation in 3RD generation aeroturbine disc alloys. Paper presented at 11th International Symposium on Superalloys, Superalloys 2008, Champion, PA, United States.10 p.
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Olson, GB, Jou, HJ, Jung, J, Sebastian, JT, Misra, A, Locci, I & Hull, D 2008, 'Precipitation model validation in 3RD generation aeroturbine disc alloys' Paper presented at 11th International Symposium on Superalloys, Superalloys 2008, Champion, PA, United States, 9/14/08 - 9/18/08, pp. 923-932.

Precipitation model validation in 3RD generation aeroturbine disc alloys. / Olson, Gregory B; Jou, H. J.; Jung, J.; Sebastian, J. T.; Misra, A.; Locci, I.; Hull, D.

2008. 923-932 Paper presented at 11th International Symposium on Superalloys, Superalloys 2008, Champion, PA, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Precipitation model validation in 3RD generation aeroturbine disc alloys

AU - Olson, Gregory B

AU - Jou, H. J.

AU - Jung, J.

AU - Sebastian, J. T.

AU - Misra, A.

AU - Locci, I.

AU - Hull, D.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - 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.

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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Olson GB, Jou HJ, Jung J, Sebastian JT, Misra A, Locci I et al. Precipitation model validation in 3RD generation aeroturbine disc alloys. 2008. Paper presented at 11th International Symposium on Superalloys, Superalloys 2008, Champion, PA, United States.