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Retained coarse grains in bulk nanocrystalline Ni3Al

  • Christian Rentenberger und Hans-Peter Karnthaler
Veröffentlicht/Copyright: 23. Mai 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 98 Heft 4

Abstract

Transmission electron microscopy methods were used to study the nanocrystalline structure achieved by severe plastic deformation of L12 long-range ordered Ni3Al. The deformation by high-pressure torsion (up to 40 000 %) leads to a duplex structure consisting of a disordered nanocrystalline and an ordered coarse-grained structure carrying different shear strains. The volume fraction of the nanocrystalline structure increases with strain but varies locally. During the deformation micrometer sized coarse-grained volumes embedded in the nanocrystalline structure are retained; they show a predominance of orientations of high symmetry. This leads to the conclusion that the stability of the coarse grains results from their homogeneous slip caused by a homogeneous activation of the slip systems.

Keywords: Intermetallic alloy; Bulk nanocrystalline; Nanostructure formation; High-pressure torsion; Transmission electron microscopy
* Correspondence address, Dr. Christian Rentenberger, Institute of Materials Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria, Tel.: +43 1 427 751 314, Fax: +43 1 427 751 316, E-mail: , http://www.univie.ac.at/materialphysik/em

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Received: 2006-10-18
Accepted: 2007-1-17
Published Online: 2013-05-23
Published in Print: 2007-04-01

© 2007, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Basic
  6. Ultrafine-grained materials: a personal perspective
  7. Retained coarse grains in bulk nanocrystalline Ni3Al
  8. The effect of grain size on strain rate sensitivity and activation volume – from nano to ufg nickel
  9. Thermal stability of ECAP processed pure Cu and CuZr
  10. Grain refinement and texture formation in torsion deformed NiAl
  11. Shear deformation of submicron-structured materials
  12. Non-microscopical methods for characterization of microstructures and properties of UFG metals
  13. Applied
  14. Deformation processing of massive nanostructured materials
  15. Effect of Nb–V addition on the mechanical behaviour and structural stability of ultrafine grained steels
  16. New trends in superplasticity in SPD-processed nanostructured materials
  17. Deformation behaviour, microstructure and processing of accumulative roll bonded aluminium alloy AA6016
  18. The influence of post-ECAP annealing on the properties of ultrafine-grained 5005 aluminum alloy sheet
  19. Enhancement in mechanical behavior and wear resistance of severe plastically deformed two-phase Zn–Al alloys
  20. Mechanical behavior of nanostructured metals and alloys in the 300–4.2 K temperature interval
  21. Notifications
  22. DGM News
https://doi.org/10.3139/146.101463
Schlagwörter für diesen Artikel
Intermetallic alloy; Bulk nanocrystalline; Nanostructure formation; High-pressure torsion; Transmission electron microscopy

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Basic
  6. Ultrafine-grained materials: a personal perspective
  7. Retained coarse grains in bulk nanocrystalline Ni3Al
  8. The effect of grain size on strain rate sensitivity and activation volume – from nano to ufg nickel
  9. Thermal stability of ECAP processed pure Cu and CuZr
  10. Grain refinement and texture formation in torsion deformed NiAl
  11. Shear deformation of submicron-structured materials
  12. Non-microscopical methods for characterization of microstructures and properties of UFG metals
  13. Applied
  14. Deformation processing of massive nanostructured materials
  15. Effect of Nb–V addition on the mechanical behaviour and structural stability of ultrafine grained steels
  16. New trends in superplasticity in SPD-processed nanostructured materials
  17. Deformation behaviour, microstructure and processing of accumulative roll bonded aluminium alloy AA6016
  18. The influence of post-ECAP annealing on the properties of ultrafine-grained 5005 aluminum alloy sheet
  19. Enhancement in mechanical behavior and wear resistance of severe plastically deformed two-phase Zn–Al alloys
  20. Mechanical behavior of nanostructured metals and alloys in the 300–4.2 K temperature interval
  21. Notifications
  22. DGM News
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