Effect of torsional oscillations on the stress-strain behavior of Al-5 wt% Mg alloy

Thumbnail Image

Date

2011

Journal Title

Journal ISSN

Volume Title

Type

Article

Publisher

ELSEVIER SCIENCE SA

Series Info

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING;Volume: 528 Issue: 18 Pages: 6026-6033

Abstract

The microstructure and mechanical properties of a precipitation hardenable Al-5 wt% Mg alloy subjected to low frequency torsional oscillations and aging treatments are reported in the present work. The stress-strain response was examined at different frequencies (1.53-3.3 Hz) and at constant shear strain amplitude ((phi = 5.69 x 10(-4)). An excessive in the softening was observed by increasing both frequency of the applied oscillations and deformation temperature. The change in the hardening and softening parameters of stress-strain relations was explained in view of spinodal decomposition in Al-Mg systems. The mean value of activation energy was found to be equal to that quoted for precipitate-dislocation intersection. (C) 2011 Elsevier B.V. All rights reserved.

Description

Accession Number: WOS:000292170200052

Keywords

University for Al-Mg alloys, Heat treatment, Stress-strain curves, Activation energy

Citation

Cited References in Web of Science Core Collection: 36