Paper Title:
Evolution of Nanostructure during the Early Stages of Ageing in Al-Zn-Mg-Cu Alloys
  Abstract

During age-hardening of certain Al-Zn-Mg-Cu alloys, a 90% hardness increase can occur with 75 seconds. The clustering and precipitation of solute element species during this early rapid hardening (RH) period has been investigated through atom probe tomography, transmission electron microscopy, and Vickers hardness measurements. This study has focussed on the effect of copper by analysing three alloys; Al-2.0Zn-1.8Mg-0.7Cu, Al-2.0Zn-1.7Mg-0.2Cu and Al-1.9Zn-1.7Mg (at.%). The early RH reaction in these alloys accounts for up to 70% of the total hardening (peak hardness minus as-quenched hardness) and takes place during the first 60 seconds of ageing. We report preferred solute-solute interactions in the as-quenched materials. This quenched-in nanostructure acts as a template for subsequent solute clustering, the nature of which we have correlated with ageing.

  Info
Periodical
Materials Science Forum (Volumes 519-521)
Edited by
W.J. Poole, M.A. Wells and D.J. Lloyd
Pages
555-560
DOI
10.4028/www.scientific.net/MSF.519-521.555
Citation
P. V. Liddicoat, T. Honma, L.T. Stephenson, S. P. Ringer, "Evolution of Nanostructure during the Early Stages of Ageing in Al-Zn-Mg-Cu Alloys", Materials Science Forum, Vols. 519-521, pp. 555-560, 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: A.I. Morley, M.W. Zandbergen, Alfred Cerezo, George D.W. Smith
Abstract:Hardness measurements and 3-dimensional atom probe analysis have been used to characterise the precipitation behaviour in two 6xxx series...
543
Authors: Zhong Kui Zhao, Qing Zhou Sun, Pu Qing Zhang, Chang Long Li, Xue Jiu Wang, Chang Qi Chen
Abstract:In this paper, Al-5.6Zn-2.8Mg-1.6Cu-0.24Cr-1.1Li, Al-8.0Zn-2.4Mg-2.4Cu-1.1Li-0.18Zr and Al-11.8Zn-2.9Mg-2.8Cu-1.1Li-0.24Zr (in wt%) alloys...
1093
Authors: Zhong Wei Chen, Li Fan, Pei Chen
Abstract:The early age hardening behavior in Al-Cu-Mg alloys with fixed Cu content (0.50 wt%) and varying amounts of Mg has been studied by hardness...
1327
Authors: Zhong Kui Zhao, Chang Long Li, Qing Zhou Sun, Pu Qing Zhang, Gui Qing Wang, Chang Qi Chen
Abstract:Effect of natural ageing on the precipitation of Al-5.6Zn-1.9Mg-1.6Cu- 1.1Li-0.24Cr (in wt.%) alloys were investigated. The ageing processes,...
2503
Authors: Hong Wei Liu, Feng Wang, Bai Qing Xiong, Yon Gan Zhang, Zhi Hui Li, Xi Wu Li
Chapter 5: Metal Alloy Materials
Abstract:In this study, the Al-Zn-Mg-Cu alloy was prepared by spray forming process. The ageing precipitation and strengthening behavior of the spray...
903