The Superplastic Deformation and Microstructural Analysis of Fine-Grained 1420 Al-Li Alloy

Abstract:

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The superplasticity of fine-grained 1420 Al-Li alloy which was prepared by two-stage aging and turning rolling process was studied by constant-strain-rate tensile test. The results showed that: good superplasticity was attained at temperature range of 460°C~520°C and deformation strain rate 1×10-4s-1~5×10-3s-1. An elongation of 650% was obtained at the temperature of 650°C and strain rate of 1×10-4s-1. Furthermore, the microstructures of material before and after deformation were examined using OM and TEM. Equiaxed grains were still kept, and the second-phase particles and dislocations were observed in the deformed samples.

Info:

Periodical:

Advanced Materials Research (Volumes 148-149)

Edited by:

Xianghua Liu, Zhengyi Jiang and Jingtao Han

Pages:

434-438

DOI:

10.4028/www.scientific.net/AMR.148-149.434

Citation:

Y. L. Zhang et al., "The Superplastic Deformation and Microstructural Analysis of Fine-Grained 1420 Al-Li Alloy", Advanced Materials Research, Vols. 148-149, pp. 434-438, 2011

Online since:

October 2010

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Price:

$35.00

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