Stress Relaxation in an AZ31 Magnesium Alloy

Pavel Lukáč; Zuzanka Trojanová

doi:10.4028/www.scientific.net/KEM.465.101

Paper Titles

Elastic Parameters of Various Rafted Structures of Model Ni-Base Alloys
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Investigation of Plasticity in Silicon Nanowires by Molecular Dynamics Simulations
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Microstructure, Fracture and Damage Mechanisms in Rare-Earth Doped Silicon Nitride Ceramics
p.93

Peierls Stresses Estimated from CRSS Vs. Temperature Curve and their Relation to the Crystal Structure
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Stress Relaxation in an AZ31 Magnesium Alloy
p.101

Elastic-Plastic Stress Singularities of Plane V-Notches in Power-Hardening Materials
p.105

Micro- and Macro-Scale Thermomechanical Modelling of Bulk Deformation in Early-Age Cement-Based Materials
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3D Discrete Dislocation Modelling of High Temperature Plasticity
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Numerical Study of the Influence of the Crack Front Curvature in the Evolution of the Plastic Zone along the CT Specimen Thickness
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 465Stress Relaxation in an AZ31 Magnesium Alloy

Stress Relaxation in an AZ31 Magnesium Alloy

Abstract:

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.