Paper Title:
Microstructural Interactions during Stress Ageing a 7475 Aerospace Alloy
  Abstract

In industrial process, like creep-ageforming, materials are aged under load. To investigate the influence of an applied stress on the ageing behaviour of Cu bearing Al-7xxx series alloys, a 7475 alloy was aged under a constant tensile stress and analysed by means of Small Angle X-ray Scattering (SAXS) and TEM. Mechanical testing was also employed, to determine if there was any effect on the materials strength. The results show that during the early stages of ageing significant interactions takes place, which preferentially aligns one type of GP zone, as well as affecting their size and volume fraction. During the second stage ageing treatment, the applied stress was observed to cause more rapid over-ageing, by promoting the formation of the η phase.

  Info
Periodical
Materials Science Forum (Volumes 519-521)
Edited by
W.J. Poole, M.A. Wells and D.J. Lloyd
Pages
333-338
DOI
10.4028/www.scientific.net/MSF.519-521.333
Citation
D. Bakavos, P. B. Prangnell, B. Bès, F. Eberl, J.G. Grossmann, "Microstructural Interactions during Stress Ageing a 7475 Aerospace Alloy", Materials Science Forum, Vols. 519-521, pp. 333-338, 2006
Online since
July 2006
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$32.00
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