Effect of Natural Ageing on Precipitation of Al-Zn-Mg-Cu-Li Alloys

Abstract:

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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, microstructure and hardness of the alloys were investigated by Vickers hardness and transmission electron microscopy (TEM). The results show that natural ageing makes the exothermic temperature range of the Al-Zn-Mg-Cu-Li alloys to shift to lower temperature. Natural ageing for 48h and followed by ageing at 120 , precipitates in the matrix of Al-Zn-Mg-Cu-Li alloys are sparse, which lowers the age hardness of the Al-Zn-Mg-Cu-Li alloys.

Info:

Periodical:

Advanced Materials Research (Volumes 168-170)

Edited by:

Lijuan Li

Pages:

2503-2506

DOI:

10.4028/www.scientific.net/AMR.168-170.2503

Citation:

Z. K. Zhao et al., "Effect of Natural Ageing on Precipitation of Al-Zn-Mg-Cu-Li Alloys", Advanced Materials Research, Vols. 168-170, pp. 2503-2506, 2011

Online since:

December 2010

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$35.00

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