Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-25T15:34:49.788Z Has data issue: false hasContentIssue false
  • English
  • Français

In-Situ Electron Microscopy Studies of the Effect of Solute Segregation on Grain Boundary Anisotropy and Mobility in an Al-Zr Alloy

Published online by Cambridge University Press:  01 February 2011

Mitra L. Taheri ,
Eric Stach ,
Velimir Radmilovic ,
Hasso Weiland  and
Anthony D. Rollett
Mitra L. Taheri
Affiliation:
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15232, USA
Eric Stach
Affiliation:
National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, CA, USA Department of Materials Science & Engineering, Purdue University, West Lafayette, IN
Velimir Radmilovic
Affiliation:
National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Hasso Weiland
Affiliation:
Alcoa Technical Center, Alcoa Center, PA 15609, USA
Anthony D. Rollett
Affiliation:
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15232, USA
Get access

Abstract

The presence of impurities in aluminum alloys is of great interest with respect to microstructural properties, specifically, the effect of solute on texture and anisotropy. This paper presents new evidence of the pronounced effect of solute drag based on in-situ annealing and Electron Backscatter Diffraction experiments of Zr-rich Al alloys subject to prior strain. A compensation effect was found for grain boundary mobility maxima for specific boundary types. Trends in activation energy as a function of boundary type support the observations of a compensation effect with respect to temperature. Evidence for irregular motion of boundaries from in-situ observations is discussed in reference to new theoretical results that suggest that boundaries migrating in the presence of solutes should move sporadically provided that the length scale at which observations are made is small enough. A study of both boundary motion and solute segregation to specific boundary types using Scanning Transmission Electron Microscopy and in-situ TEM is presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 839: Symposium P – Electron Microscopy of Molecular and Atom-Scale Mechanical Behavior, Chemistry, and Structure , 2004 , P7.7
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

REFERENCES

1. Taheri, M.L., Rollett, A.D., and Weiland, H., “In-Situ Quantification of Solute Effects on Grain Boundary Mobility and Character in Aluminum Alloys During Recrystallization,” Materials Science Forum 467–470 (2004) 997–1002 Google Scholar
2. Taheri, M.L., Rollett, A.D. and Weiland, H., “In-Situ Investigation of Grain Boundary Mobility and Character in Aluminum Alloys in the Presence of a Stored Energy Driving Force,” Mat. Res. Soc. Symp. Proc., 819 (2004) N6.5.Google Scholar
3. Lücke, K. and Stüwe, H.P.: Acta metall. Vol.19 (1971) p. 1087–1099;Google Scholar
Cahn, J.: Acta metall. Vol. 10 (1962), p. 789–798.Google Scholar
4. Molodov, D.A. et al.: Acta Mater. Vol. 46 (1998), p. 553–562.Google Scholar
5. 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
6. Huang, Y. and Humphreys, F.J.: Acta Mater. Vol. 47 (1999), p. 2259–2271.Google Scholar
7. Huang, Y. and Humphreys, F.J.: Acta materiala, Vol. 48 (2000), p.2017–2030 Google Scholar
8. Mendelev, M.I. and Srolovitz, D.J.: Acta materiala Vol. 49 (2001), p. 589.Google Scholar
9. Gottstein, G. and Shvindlerman, L.S.: Grain Boundary Migration in Metals: Thermodynamics, Kinetics, Applications (CRC Press, 1999).Google Scholar
10. Vandermeer, R.A. and Juul Jensen, D.: Metall. Mater. Trans A Vol.28 (1997), p.749–754.Google Scholar
11. Humphreys, F.J. and Hatherly, M.: Recrystallization and Related Annealing Phenomena (Pergamon Press, Oxford, 1995).Google Scholar
12. Hutchinson, B., Jonsson, S. and Ryde, L.: Scripta Met. 23 (1989), p. 671.Google Scholar
13. Vandermeer, R.A. and Juul Jensen, D‥: Metall.Mater.Trans A, Vol. 28 (1997), p.749–754.Google Scholar
14. Boutin, F.R., Journal de Physique, colloque C4, supplement No.10, vol.36, October >1975, pp. C4355–C43651975,+pp.+C4355–C4365>Google Scholar
15. Bokstein, B.S., Mat. Sci. Forum 217–222 (1996) 685 Google Scholar
16. Srolovitz, D.J., Informal Communication on ‘Irregular Grain Boundary Motion’ at the Computational Materials Science Network Workshop, Golden, CO, October 2003 Google Scholar
17. Mendelev, M.I. and Srolovitz, D.J., Modelling Simul. Mater. Sci. Eng. 10 (2002) R79–R109Google Scholar
18. Browning, N. D. and Pennycook, S. J., “Direct Experimental Determination of the Atomic Structure at Internal Interfaces,” J. Phys. D 29, 1779 (1996).Google Scholar
19. Pennycook, S. J., Jesson, D. E., Chisholm, M. F., Browning, N. D., McGibbon, A. J., and McGibbon, M. M., “Z -Contrast Imaging in the Scanning Transmission Electron Microscope,” J. Microsc. Soc. Am. 1, 231 (1995).Google Scholar