Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-25T15:37:18.154Z Has data issue: false hasContentIssue false
  • English
  • Français

Evidence for Solute Drag during Recrystallization of Aluminum Alloys

Published online by Cambridge University Press:  01 February 2011

Mitra L. Taheri ,
Jason Sebastian ,
David Seidman  and
Anthony Rollett
Mitra L. Taheri
Affiliation:
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15232, USA
Jason Sebastian
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, IL,USA
David Seidman
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, IL,USA
Anthony Rollett
Affiliation:
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15232, USA
Get access

Abstract

Evidence of both solute drag as well as differences in migration mechanisms of certain boundary types has been found for an Al-Zr alloy. In-situ Transmission Electron Microscopy (TEM) annealing experiments coupled with Scanning Transmission Electron Microscopy (STEM) showed a stark contrast between Zr segregation at small and large scales. Specifically, Zr was found to segregate to, as well as precipitate at boundaries of grains smaller than 2 microns, whereas less segregation and no precipitation was found at large grains sizes, or long annealing times. Motivated by these results and those previously obtained by Orientation Imaging Microscopy (OIM), Local Electrode Atom Probe Microscopy with an Imago™ LEAP® microscope, was used to determine the concentrations of Zr and Al ions at grain boundaries; the results confirmed those from the STEM.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 882: Symposium EE – Linking Length Scales in the Mechanical Behavior of Materials , 2005 , EE6.5/BB6.5
Copyright
Copyright © Materials Research Society 2005

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 Srolovitz, D.J., Informal Communication on ‘Irregular Grain Boundary Motion’ at the Computational Materials Science Network Workshop, Golden, CO, October 2003 Google Scholar
2 Mendelev, M.I. and Srolovitz, D.J., Modelling Simul. Mater. Sci. Eng. 10 (2002) R79–R109Google Scholar
3 Mendelev, M.I. and Srolovitz, D.J.: Acta materiala Vol. 49 (2001), p. 589.Google Scholar
4 Krakauer, B.W. et al. : Rev.Sci.Instrum. 61(11), November 1990, pp.3390–3398 Google Scholar
5 Krakauer, B.W. and Seidman, D.N.: Acta mater. Vol.46, No. 17, pp. 6145–6161, 1998 Google Scholar
6 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
7 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
8 Taheri, M.L., Stach, Eric, Radmilovic, V.R., Weiland, H. and Rollett, A.D., “In-Situ Electron Microscopy Studies of the Effect of Zr on Grain Boundary Anisotropy and Mobility in an Aluminum Alloy,” Mat. Res. Soc. Symp. Proc., (2004) P7.7. Google Scholar
9 Boutin, F.R., Journal de Physique, colloque C4, supplement No.10, vol.36, October 1975, pp. C4355–C4365Google Scholar
10 , Doherty et al. , Materials Science and Engineering (A) 238 p.219, 1997 Google Scholar