Paper Title:
Use of Small-Angle X-Ray Scattering for the Characterisation of Precipitates in Aluminium Alloys
  Abstract

This paper presents two studies illustrating the possibilities of Small-Angle X-ray Scattering for characterising quantitatively the state of precipitation in aluminium alloys. In the first example, maps are presented, of precipitate size and volume fraction in the cross-section of friction stir welds of AA7449 alloy. It is shown that the influence of welding speed on the distribution of mechanical properties can be understood using this microstructural data. In the second example, the precipitation kinetics in an Al-Zr-Sc alloy is evaluated by in-situ small angle X-ray scattering. Evidence is given for the heterogeneous chemical structure of the Al3(Zr,Sc) precipitates, consisting of a Zr-rich shell surrounding a Sc-rich core. It is shown that this particular distribution results in a very good resistance to coarsening of the precipitate microstructure.

  Info
Periodical
Materials Science Forum (Volumes 519-521)
Edited by
W.J. Poole, M.A. Wells and D.J. Lloyd
Pages
1349-1354
DOI
10.4028/www.scientific.net/MSF.519-521.1349
Citation
A. Deschamps, M. Dumont, L. Lae, F. Bley, "Use of Small-Angle X-Ray Scattering for the Characterisation of Precipitates in Aluminium Alloys", Materials Science Forum, Vols. 519-521, pp. 1349-1354, 2006
Online since
July 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Christophe Sigli
Abstract:A kinetic model has been developed to simulate the precipitate size distribution and the resulting yield strength during ageing of 7xxx...
321
Authors: T. Marlaud, B. Baroux, Alexis Deschamps, J.L. Chemin, C. Hénon
Abstract:The microstructural evolution has been investigated in three alloys of the 7000 series possessing increasing zinc contents by combining...
455
Authors: Alexis Deschamps, Fabien Perrard, Françoise Bley, Patricia Donnadieu, Philippe Maugis
Abstract:This paper presents a physically based precipitation model which aims at describing precipitation kinetics when it occurs exclusively on...
4161
Authors: Zhi Wei Du, B.L. Shao, A.S. Liu, Z.M. Sun, X.S. Zhang, T.T. Zhou, Chang Qi Chen
Abstract:The evolution of microstructure, precipitate size, volume fraction and integrated intensity of Al-8.0Zn-2.05Mg-1.76Cu (7055) and 7055-1.0Li...
977
Authors: J.D. Robson, L. Campbell
Chapter 8: Friction Stir Processing Welding
Abstract:Friction stir welding is conceptually simple but metallurgically highly complex due to thecombination of severe deformation and high...
1008