Stress Relaxation in an AZ31 Magnesium Alloy

Abstract:

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Stress relaxation tests have been used in order to determine parameters of a possible thermally activated process in AZ31 magnesium alloy. The samples were deformed at a constant initial strain rate of 6.7x10-5 s-1 at various temperatures between room temperature and 300 °C. Stress relaxation, i.e. a decrease in the stress with time, was measured at various stress levels and at various temperatures. An analysis of the stress relaxation curves enabled to estimate the internal stress as a function of the strain and the test temperature. It has been shown that the activation volume is a function of the effective stress independently of the deformation temperature.

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Periodical:

Edited by:

Pavel Šandera

Pages:

101-104

DOI:

10.4028/www.scientific.net/KEM.465.101

Citation:

P. Lukáč and Z. Trojanová, "Stress Relaxation in an AZ31 Magnesium Alloy", Key Engineering Materials, Vol. 465, pp. 101-104, 2011

Online since:

January 2011

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Price:

$35.00

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