Hostname: page-component-5c6d5d7d68-sv6ng Total loading time: 0 Render date: 2024-08-06T13:15:02.774Z Has data issue: false hasContentIssue false
  • English
  • Français

In-Situ Investigation of Grain Boundary Mobility and Character in Aluminum Alloys in the Presence of a Stored Energy Driving Force

Published online by Cambridge University Press:  15 March 2011

Mitra L. Taheri ,
Anthony D. Rollett  and
Hasso Weiland
Mitra L. Taheri
Affiliation:
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15232, USA
Anthony D. Rollett
Affiliation:
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15232, USA
Hasso Weiland
Affiliation:
Alcoa Technical Center, Alcoa Center, PA 15609, USA
Get access

Abstract

This paper investigates the effect of solute in Al alloys on grain boundary character and mobility based on experiments in which individual boundaries migrate under a stored energy driving pressure acquired from prior plastic strain; among those studied are Zr, Fe and Si. A compensation effect is noted for both alloys studied with respect to both temperature and solute content. As supported by the literature, boundaries exhibit a maximum mobility for a 38-39°<111> misorientation in initial annealing experiments; this mobility maximum is asymmetric with a sharp cutoff below 38-39° but a more gradual decrease at misorientations beyond 40°. The presence of a minimum at 38-39° is found at both higher temperatures and higher solute concentrations. A shift in texture dependency with solute and temperature is also observed. This transition from a local mobility maximum to a minimum is discussed within the context of recent developments in solute drag theory.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 819: Symposia N/P – Interfacial Engineering for Optimized Properties III , 2004 , N6.5
Copyright
Copyright © Materials Research Society 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Lücke, K. and Stüwe, H.P.: Acta metall. Vol.19 (1971) p. 1087–1099; J. Cahn: Acta metall. Vol. 10 (1962), p. 789–798.Google Scholar
2. Molodov, D.A. et al. : Acta Mater. Vol. 46 (1998), p. 553–562.Google Scholar
3. Huang, Y. and Humphreys, F.J.: in Recrystallization and Grain Growth, Gottstein, G. and Molodov, D.A., Eds, (Springer-Verlag, 2001) p. 409.Google Scholar
4. Huang, Y. and Humphreys, F.J.: Acta Mater. Vol. 47 (1999), p. 2259–2271.Google Scholar
5. Mendelev, M.I. and Srolovitz, D.J.: Acta materiala Vol. 49 (2001), p. 589.Google Scholar
6. Gottstein, G. and Shvindlerman, L.S.: Grain Boundary Migration in Metals: Thermodynamics, Kinetics, Applications (CRC Press, 1999).Google Scholar
7. Vandermeer, R.A. and Juul, D. Jensen: Metall. Mater. Trans A Vol.28 (1997), p.749–754.Google Scholar
8. Humphreys, F.J. and Hatherly, M.: Recrystallization and Related Annealing Phenomena (Pergamon Press, Oxford, 1995).Google Scholar
9. Hutchinson, B., Jonsson, S. and Ryde, L.: Scripta Met. 23 (1989), p. 671.Google Scholar
10. Vandermeer, R.A. and Jensen, D. Juul: Metall.Mater.Trans A, Vol. 28 (1997), p.749–754.Google Scholar
11. Taheri, M., Rollett, A.D. and Weiland, H., Proceedings of the 2nd International Conference on Recrystallization and Grain Growth, Annecy, France (to be published)Google Scholar
12. Boutin, F.R., Journal de Physique, colloque C4, supplement No.10, vol.36, October 1975, pp. C4355–C4365Google Scholar