Vol. 6, No. 7-8, 2011

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ISSN: 1559-3959
Influence of specimen geometry on the Portevin–Le Châtelier effect due to dynamic strain aging for the AA5083-H116 aluminum alloy

Rodrigo Nogueira de Codes and Ahmed Benallal

Vol. 6 (2011), No. 7-8, 951–968
Abstract
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Digital image correlation and digital infrared thermography are employed to capture and characterize the spatiotemporal aspects of the Portevin–Le Châtelier phenomenon due to dynamic strain aging in various types of specimens. Deformation bands are visualized and the effects of the specimen shape on the morphology of the bands are underlined. Further, while the deformation bands are usually seen to propagate along the whole gauge length of smooth specimens, they are observed here to be generally trapped around stress concentrators.

Keywords
Portevin–Le Châtelier effect, AA5083-H116 aluminum alloy, specimen geometry, dynamic strain aging
Milestones
Received: 7 August 2010
Revised: 30 November 2010
Accepted: 26 December 2010
Published: 21 December 2011
Authors
Rodrigo Nogueira de Codes
LMT-Cachan
ENS Cachan/CNRS/UPMC/PRES UniverSud Paris
61 Avenue du Président Wilson
94235 Cachan
France
Ahmed Benallal
LMT-Cachan
ENS Cachan/CNRS/UPMC/PRES UniverSud Paris
61 Avenue du Président Wilson
94235 Cachan
France