Study on Cavity Growth in Uniaxial Tension of ZK60 Magnesium Alloy

Abstract:

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Cavity growth is a typical microstructure feature in superplastic forming (SPF) of materials. Substantial growth and interlink of cavities in superplastic deformation usually lead to reduction in elongation, even to failure. Consequently, it is necessary to investigate the mechanism and model of cavity growth. In this paper, experimental studies on cavity growth were carried out by means of superplastic tension of ZK60 magnesium alloys. Scanning electronic microscope (SEM) was employed for observation of fractography. Experimental cavity radius and volume fraction were determined by optical microscopy and corresponding picture-based analysis software. It is found that, the fractured surfaces after a superplastic elongation have a mixed characteristic of intergranular cavities and dimples. Further, the cavity growth is identified to follow a exponentially increasing mode.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

687-690

DOI:

10.4028/www.scientific.net/KEM.353-358.687

Citation:

Y. D. Yu et al., "Study on Cavity Growth in Uniaxial Tension of ZK60 Magnesium Alloy", Key Engineering Materials, Vols. 353-358, pp. 687-690, 2007

Online since:

September 2007

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Price:

$35.00

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