Effect of Thermomechanical Treatment on the Texture Evolution and Superplasticity of a Zn-0.3wt.% Al Alloy

Abstract:

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Texture evolution and superplastic deformation behavior of a quasi-single phase Zn-0.3wt%Al have been investigated. It was attempted to produce a stable and fine-grained microstructure in a dilute Zn-Al alloy through a proper thermomechanical treatment process (TMTP). The grain size of about 1 µm was obtained in the Zn-0.3 wt.% Al alloy and a relatively coarse grain size of 10 µm was also obtained through a subsequent aging treatment. The fine-grained material showed typical rolling texture with basal poles tilted about 30 degrees away from the ND toward RD, while the coarse-grained material showed a typical recrystallization texture with basal poles parallel to ND. A series of load relaxation and tensile tests were conducted at room temperature. According to the internal variable theory of structural superplasticity, the grain boundary characters of fine and coarse-grained materials were different from each other. A large elongation of about 1400% was obtained in fine-grained material at room temperature.

Info:

Periodical:

Materials Science Forum (Volumes 495-497)

Edited by:

Paul Van Houtte and Leo Kestens

Pages:

889-894

DOI:

10.4028/www.scientific.net/MSF.495-497.889

Citation:

T. K. Ha et al., "Effect of Thermomechanical Treatment on the Texture Evolution and Superplasticity of a Zn-0.3wt.% Al Alloy ", Materials Science Forum, Vols. 495-497, pp. 889-894, 2005

Online since:

September 2005

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Price:

$35.00

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