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A mesoscopic grain boundary sliding controlled flow model for superplasticity in intermetallics

  • Kuppuswamy Anantha Padmanabhan and Mohammed Ishaq Raviathul Basariya
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 100 Issue 11

Abstract

A model based on grain/interphase boundary sliding controlled flow that develops to a mesoscopic scale (defined to be equal to or more than a grain diameter) has been used to understand superplasticity in micrometer- and sub-micrometer grained intermetallics. The procedure for analyzing the experimental stress–strain rate data at a fixed initial grain size and temperature is so developed that the free energy of activation for the rate controlling deformation process, and the long range threshold stress which has to be overcome for boundary sliding to develop to a mesoscopic scale, σ0disloc, are estimated directly from the experimental results. The analysis is validated using experimental data pertaining to a number of systems. Directions for further development of the model are indicated.

Keywords: Superplasticiy; Intermetallics; Grain/interphase boundary sliding; Mesoscopic boundary sliding; High-angle grain boundaries
* Correspondence address, Prof. Dr. K.A. Padmanabhan Professor of Eminence, Anna University Students' Affairs Wing, Administration Wing, Anna University Chennai 600 025, India Tel.: +91 44 2220 3030 Fax: +91 44 2235 2270 E-mail: ; Address during 2009: Mercator Visiting Professor, Institute of Materials Physics Univesity of Münster Wilhlem-Klemm-Strasse 10, 48149 Münster, Germany Tel.: +49 251 83 39008 Fax: +49 251 83 38346 E-mail:

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Received: 2008-6-3
Accepted: 2009-2-27
Published Online: 2013-06-11
Published in Print: 2009-11-01

© 2009, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Multiscale materials simulation: the maturing of a scientific concept
  5. Feature
  6. Atomistic modelling of materials with bond-order potentials
  7. Interstitial impurities at grain boundaries in metals: insight from atomistic calculations
  8. Multiscale modeling of polymers at interfaces
  9. Coupling atomistic accuracy with continuum effectivity for predictive simulations in materials research – the Quasicontinuum Method
  10. Basic
  11. Relative effects of Mo and B on ferrite and bainite kinetics in strong steels
  12. Experimental study of phase relations in the ZrO2–La2O3–Y2O3 system
  13. Surface tension of liquid Al–Cu binary alloys
  14. Microstructure of Ti-6Al-4V specimens produced by shaped metal deposition
  15. A mesoscopic grain boundary sliding controlled flow model for superplasticity in intermetallics
  16. Molten salt synthesis and phase evolution of Ba(Cd1/3Nb2/3)O3
  17. Applied
  18. Microstructure and properties of violin strings made of metastable austenitic steel
  19. Transformation of reverted austenite in a maraging steel under external loading: an in-situ X-ray diffraction study using high-energy synchrotron radiation
  20. Effect of heat treatment on the strain hardening behaviour of an Al–Zn–Mg alloy
  21. Ball milling as a possible means to produce zinc based coatings
  22. Size difference effects on the bulk, and surface properties of Bi–Zn, Cu–Pb, K–Pb and K–Tl liquid alloys
  23. Microstructure and mechanical properties of NiAl–Cr(Mo)–Hf/Ho near-eutectic alloy prepared by suction casting
  24. Investigation of fatigue fracture of generator-rotor fan blades
  25. Notifications
  26. Personal
https://doi.org/10.3139/146.110218
Keywords for this article
Superplasticiy; Intermetallics; Grain/interphase boundary sliding; Mesoscopic boundary sliding; High-angle grain boundaries

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Multiscale materials simulation: the maturing of a scientific concept
  5. Feature
  6. Atomistic modelling of materials with bond-order potentials
  7. Interstitial impurities at grain boundaries in metals: insight from atomistic calculations
  8. Multiscale modeling of polymers at interfaces
  9. Coupling atomistic accuracy with continuum effectivity for predictive simulations in materials research – the Quasicontinuum Method
  10. Basic
  11. Relative effects of Mo and B on ferrite and bainite kinetics in strong steels
  12. Experimental study of phase relations in the ZrO2–La2O3–Y2O3 system
  13. Surface tension of liquid Al–Cu binary alloys
  14. Microstructure of Ti-6Al-4V specimens produced by shaped metal deposition
  15. A mesoscopic grain boundary sliding controlled flow model for superplasticity in intermetallics
  16. Molten salt synthesis and phase evolution of Ba(Cd1/3Nb2/3)O3
  17. Applied
  18. Microstructure and properties of violin strings made of metastable austenitic steel
  19. Transformation of reverted austenite in a maraging steel under external loading: an in-situ X-ray diffraction study using high-energy synchrotron radiation
  20. Effect of heat treatment on the strain hardening behaviour of an Al–Zn–Mg alloy
  21. Ball milling as a possible means to produce zinc based coatings
  22. Size difference effects on the bulk, and surface properties of Bi–Zn, Cu–Pb, K–Pb and K–Tl liquid alloys
  23. Microstructure and mechanical properties of NiAl–Cr(Mo)–Hf/Ho near-eutectic alloy prepared by suction casting
  24. Investigation of fatigue fracture of generator-rotor fan blades
  25. Notifications
  26. Personal
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