Precipitation and mechanical properties of supersaturated Al-Zn-Mg alloys processed by severe plastic deformation

Schiller, I. and Gubicza, Jenő and Kovács, Zsolt and Chinh, Nguyen Quang and Illy, J. (2006) Precipitation and mechanical properties of supersaturated Al-Zn-Mg alloys processed by severe plastic deformation. In: ALUMINIUM ALLOYS 2006, PTS 1 AND 2 - RESEARCH THROUGH INNOVATION AND TECHNOLOGY. Materials Science Forum (519-21). Trans Tech Publications, Zürich, pp. 835-840. ISBN 0-87849-408-1

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Abstract

Supersaturated Al-4.8Zn-1.2Mg-0.14Zr and Al-5.7Zn-1.9Mg-0.35Cu (wt.%) alloys were processed by Equal-Channel Angular Pressing (ECAP) at 200°C. The crystallite size distribution and the characteristic parameters of the dislocation structure of both Al matrix and precipitates were determined by X-ray diffraction line profile analysis, which has been complemented by transmission electron microscopy (TEM) observations. The results show that severe plastic deformation promotes the precipitation process and consequently has a strong influence on the strength of these alloys.

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