Thermodynamic and kinetic modelling: creep resistant materials

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Abstract

The use of thermodynamic and kinetic modelling of microstructure evolution in materials exposed to high temperatures in power plants is demonstrated with two examples. Precipitate stability in martensitic 9–12%Cr steels is modelled including equilibrium phase stability, growth of Laves phase particles and coarsening of MX, M23C6 and Laves phase particles. The modelling provided new insight into the long term stability of new steels. Modelling of the detrimental precipitation of Z phase Cr(V,Nb)N is described, which points to new approaches in alloy development for higher temperatures. Predictions of interdiffusion between a MCrAlY coating and an IN738 bulk alloy by multicomponent diffusion calculations provide a highly versatile tool for life assessment of service exposed gas turbine components as well as for the development of improved coatings.
Original languageEnglish
JournalMaterials Science and Technology
Volume24
Issue number2
Pages (from-to)149-158
ISSN0267-0836
DOIs
Publication statusPublished - 2008

Keywords

  • IN738
  • Microstructure modelling
  • 9-12% steels
  • Z phase
  • MCrA/Y coating
  • Precipitate growth
  • Interdiffusion
  • Coarsening

Cite this

@article{b4d03477c76e4eafa604f60fc14b5f9f,
title = "Thermodynamic and kinetic modelling: creep resistant materials",
abstract = "The use of thermodynamic and kinetic modelling of microstructure evolution in materials exposed to high temperatures in power plants is demonstrated with two examples. Precipitate stability in martensitic 9–12{\%}Cr steels is modelled including equilibrium phase stability, growth of Laves phase particles and coarsening of MX, M23C6 and Laves phase particles. The modelling provided new insight into the long term stability of new steels. Modelling of the detrimental precipitation of Z phase Cr(V,Nb)N is described, which points to new approaches in alloy development for higher temperatures. Predictions of interdiffusion between a MCrAlY coating and an IN738 bulk alloy by multicomponent diffusion calculations provide a highly versatile tool for life assessment of service exposed gas turbine components as well as for the development of improved coatings.",
keywords = "IN738, Microstructure modelling, 9-12{\%} steels, Z phase, MCrA/Y coating, Precipitate growth, Interdiffusion, Coarsening",
author = "John Hald and L. Korcakova and Danielsen, {Hilmar Kjartansson} and Dahl, {Kristian Vinter}",
year = "2008",
doi = "10.1179/174328408X265622",
language = "English",
volume = "24",
pages = "149--158",
journal = "Materials Science and Technology",
issn = "0267-0836",
publisher = "CRC Press/Balkema",
number = "2",

}

Thermodynamic and kinetic modelling: creep resistant materials. / Hald, John; Korcakova, L.; Danielsen, Hilmar Kjartansson; Dahl, Kristian Vinter.

In: Materials Science and Technology, Vol. 24, No. 2, 2008, p. 149-158.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Thermodynamic and kinetic modelling: creep resistant materials

AU - Hald, John

AU - Korcakova, L.

AU - Danielsen, Hilmar Kjartansson

AU - Dahl, Kristian Vinter

PY - 2008

Y1 - 2008

N2 - The use of thermodynamic and kinetic modelling of microstructure evolution in materials exposed to high temperatures in power plants is demonstrated with two examples. Precipitate stability in martensitic 9–12%Cr steels is modelled including equilibrium phase stability, growth of Laves phase particles and coarsening of MX, M23C6 and Laves phase particles. The modelling provided new insight into the long term stability of new steels. Modelling of the detrimental precipitation of Z phase Cr(V,Nb)N is described, which points to new approaches in alloy development for higher temperatures. Predictions of interdiffusion between a MCrAlY coating and an IN738 bulk alloy by multicomponent diffusion calculations provide a highly versatile tool for life assessment of service exposed gas turbine components as well as for the development of improved coatings.

AB - The use of thermodynamic and kinetic modelling of microstructure evolution in materials exposed to high temperatures in power plants is demonstrated with two examples. Precipitate stability in martensitic 9–12%Cr steels is modelled including equilibrium phase stability, growth of Laves phase particles and coarsening of MX, M23C6 and Laves phase particles. The modelling provided new insight into the long term stability of new steels. Modelling of the detrimental precipitation of Z phase Cr(V,Nb)N is described, which points to new approaches in alloy development for higher temperatures. Predictions of interdiffusion between a MCrAlY coating and an IN738 bulk alloy by multicomponent diffusion calculations provide a highly versatile tool for life assessment of service exposed gas turbine components as well as for the development of improved coatings.

KW - IN738

KW - Microstructure modelling

KW - 9-12% steels

KW - Z phase

KW - MCrA/Y coating

KW - Precipitate growth

KW - Interdiffusion

KW - Coarsening

U2 - 10.1179/174328408X265622

DO - 10.1179/174328408X265622

M3 - Journal article

VL - 24

SP - 149

EP - 158

JO - Materials Science and Technology

JF - Materials Science and Technology

SN - 0267-0836

IS - 2

ER -