Startseite The emergence and disappearance of a high density of microcracks in nitrided Fe-4.65 at.% Al alloy
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The emergence and disappearance of a high density of microcracks in nitrided Fe-4.65 at.% Al alloy

  • Sairamudu Meka , Santosh S. Hosmani , Arno R. Clauss und Eric J. Mittemeijer
Veröffentlicht/Copyright: 23. Mai 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 99 Heft 7

Abstract

Nitriding of recrystallised and cold-rolled Fe-4.65 at.% Al alloy at 550 °C in an ammonia – hydrogen gas mixture of nitriding potential 0.104 atm− 1/2 indicated that nucleation of the thermodynamically (most) stable hexagonal (wurzite) AlN in the ferrite matrix of recrystallised specimen is difficult. The competition between the precipitation of nitrogen gas (dissociation of nitrogen supersaturated ferrite into pure ferrite and nitrogen gas) at the grain boundaries and the precipitation of hexagonal (wurzite) AlN led, via the coalescence of pores filled with nitrogen gas, to the emergence of microcracks along the grain boundaries and the formation of nitride-precipitate free zones near the grain boundaries of the recrystallised specimens. Upon continued nitriding the initially partially nitrided grains became fully nitrided and the microcracks disappeared.

Keywords: Nitriding; Fe–Al alloy; Microcracks; Aluminium nitride; Electron probe microanalysis
* Correspondence address, Prof. Dr. Ir. Eric Jan Mittemeijer Max Planck Institute for Metals Research Heisenbergstr. 3, D-70569 Stuttgart, Germany Tel.: +49 711 689 3373 Fax: +49 711 689 3312 E-mail:

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Received: 2007-9-19
Accepted: 2008-5-2
Published Online: 2013-05-23
Published in Print: 2008-07-01

© 2008, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Basic
  4. On the reaction scheme and liquidus surface in the ternary system Al–Si–Ti
  5. Experimental study of the phase equilibria of the Ni – Zr system
  6. Tensile behaviour of micro-sized copper wires studied using a novel fibre tensile module
  7. Dislocation densities in soft and hard oriented grains of compression deformed textured NiAl polycrystals
  8. The influence of plastic instabilities on the mechanical properties of a high-manganese austenitic FeMnC steel
  9. Modeling of isothermal bainite formation based on the nucleation kinetics
  10. Application of the Kaptay model in calculation of ternary liquid alloys' viscosities
  11. The influence of the austenite dispersion on phase transformation during the austempering of ductile cast iron having a dual matrix structure
  12. Effect of trace Ti on the microstructure and mechanical properties of AM50 alloy
  13. Applied
  14. Diffusion bonding of the Mo-base alloy TZM with interlayers
  15. Amorphization, nanocrystallization and magnetic properties of mechanically milled Sm–Co magnetic powders
  16. Wear behavior of plasma nitrided AISI 420 stainless steel
  17. Hot extrusion of α and α/β-brass alloys
  18. Role of surface texture and roughness parameters in friction and transfer layer formation under dry and lubricated sliding conditions
  19. The emergence and disappearance of a high density of microcracks in nitrided Fe-4.65 at.% Al alloy
  20. Notifications
  21. DGM News
https://doi.org/10.3139/146.101703
Schlagwörter für diesen Artikel
Nitriding; Fe–Al alloy; Microcracks; Aluminium nitride; Electron probe microanalysis

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Basic
  4. On the reaction scheme and liquidus surface in the ternary system Al–Si–Ti
  5. Experimental study of the phase equilibria of the Ni – Zr system
  6. Tensile behaviour of micro-sized copper wires studied using a novel fibre tensile module
  7. Dislocation densities in soft and hard oriented grains of compression deformed textured NiAl polycrystals
  8. The influence of plastic instabilities on the mechanical properties of a high-manganese austenitic FeMnC steel
  9. Modeling of isothermal bainite formation based on the nucleation kinetics
  10. Application of the Kaptay model in calculation of ternary liquid alloys' viscosities
  11. The influence of the austenite dispersion on phase transformation during the austempering of ductile cast iron having a dual matrix structure
  12. Effect of trace Ti on the microstructure and mechanical properties of AM50 alloy
  13. Applied
  14. Diffusion bonding of the Mo-base alloy TZM with interlayers
  15. Amorphization, nanocrystallization and magnetic properties of mechanically milled Sm–Co magnetic powders
  16. Wear behavior of plasma nitrided AISI 420 stainless steel
  17. Hot extrusion of α and α/β-brass alloys
  18. Role of surface texture and roughness parameters in friction and transfer layer formation under dry and lubricated sliding conditions
  19. The emergence and disappearance of a high density of microcracks in nitrided Fe-4.65 at.% Al alloy
  20. Notifications
  21. DGM News
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