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Precipitation behaviour of an Fe–Co–Mo-alloy during non-isothermal ageing

  • H. Leitner , M. Schober , H. Clemens , D. Caliskanoglu and F. Danoix
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 99 Issue 4

Abstract

Fe – Co – Mo alloys show hardening behaviour comparable to that of precipitation hardened Al-alloys, which is characterised by a low hardness after solution annealing and a significant increase in the hardness during subsequent ageing at higher temperatures. In this study, the precipitation behaviour of Fe-25% Co-15% Mo (wt.%) has been studied applying non-isothermal ageing. High sensitivity differential scanning calorimetry and atom probe tomography have been used to characterise the precipitation sequence. Three overlapping exothermic reactions, which are related to precipitation reactions, are observed in the temperature range of 400 to 700°C. The investigations have shown that precipitation starts with diffusion of Mo, followed by the formation of the intermetallic μ-phase which reaches its equilibrium composition at a temperature of about 615°C.

Keywords: Differential scanning calorimetry; Three-dimensional atom probe; Precipitation behaviour
* Correspondence address, Dr. Harald Leitner, Department of Physical Metallurgy and Materials Testing, University of Leoben, Franz-Josef-Straße 18, A-8700 Leoben, Austria, Tel.: +43 3842 402 4217, Fax: +43 3842 402 4202, E-mail:

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Received: 2007-10-25
Accepted: 2008-1-21
Published Online: 2013-06-11
Published in Print: 2008-04-01

© 2008, Carl Hanser Verlag, München

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  2. Contents
  3. Editorial
  4. Horst Cerjak – Emeritus Professor
  5. Review
  6. Calculation of crystallographic texture due to displacive transformations
  7. Basic
  8. Ferrite transformation from oxide–steel interface in HAZ-simulated C–Mn steel
  9. Influence of metastable tetragonal ZrO2-reinforcements on the properties of MoSi2-composites
  10. Joining strategies for open-porous metallic foams
  11. Precipitation behaviour of an Fe–Co–Mo-alloy during non-isothermal ageing
  12. Characterization of δ-phase in superalloy Allvac 718PlusTM
  13. Direct observation of phase transformations in the simulated heat-affected zone of a 9Cr martensitic steel
  14. Effect of boron on creep deformation behavior and microstructure evolution in 9% Cr steel at 650°C
  15. Effect of stress on the creep deformation of ASME Grade P92/T92 steels
  16. Applied
  17. Assessment of creep rupture life of weldments of martensitic steels
  18. Computational analysis of the precipitation kinetics in a complex tool steel
  19. Predicted precipitate back-stress and creep rupture strength of the advanced 9–12% Cr steel COST E2
  20. Compositional characterisation and thermodynamic modelling of nitride precipitates in a 12% Cr steel
  21. The L2 norm of the deviation between the measured and computed transient displacement field in a test weld
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  23. Notifications
  24. DGM News
https://doi.org/10.3139/146.101647
Keywords for this article
Differential scanning calorimetry; Three-dimensional atom probe; Precipitation behaviour

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Horst Cerjak – Emeritus Professor
  5. Review
  6. Calculation of crystallographic texture due to displacive transformations
  7. Basic
  8. Ferrite transformation from oxide–steel interface in HAZ-simulated C–Mn steel
  9. Influence of metastable tetragonal ZrO2-reinforcements on the properties of MoSi2-composites
  10. Joining strategies for open-porous metallic foams
  11. Precipitation behaviour of an Fe–Co–Mo-alloy during non-isothermal ageing
  12. Characterization of δ-phase in superalloy Allvac 718PlusTM
  13. Direct observation of phase transformations in the simulated heat-affected zone of a 9Cr martensitic steel
  14. Effect of boron on creep deformation behavior and microstructure evolution in 9% Cr steel at 650°C
  15. Effect of stress on the creep deformation of ASME Grade P92/T92 steels
  16. Applied
  17. Assessment of creep rupture life of weldments of martensitic steels
  18. Computational analysis of the precipitation kinetics in a complex tool steel
  19. Predicted precipitate back-stress and creep rupture strength of the advanced 9–12% Cr steel COST E2
  20. Compositional characterisation and thermodynamic modelling of nitride precipitates in a 12% Cr steel
  21. The L2 norm of the deviation between the measured and computed transient displacement field in a test weld
  22. Toward reliable calculations of heat and plastic flow during friction stir welding of Ti-6Al-4V alloy
  23. Notifications
  24. DGM News
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