[Kovove materialy - Metallic materials]
    Thu - March 28, 2024 - 13:46 No. of hits : 1736405 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 45 (2007), Issue 3

Inhomogeneity and anisotropy of mechanical properties of extruded aluminium alloys investigated by the acoustic emission technique
DOBRON, P., CHMELIK, F., OCENASEK, V., HOMOLA, P.
vol. 45 (2007), no. 3, pp. 171 - 176

Abstract
The process of extrusion is responsible for a strong anisotropy of mechanical properties in many aluminium alloys, specifically with respect to the position of the material in the extruded profile. The inhomogeneity and anisotropy of mechanical properties through the profiles of AlMg3 and AlCuMgLi alloys have been investigated by the measurements of the acoustic emission (AE). Extruded profiles were exposed to a solution heat treatment and, for the AlCuMgLi alloy, also to a subsequent artificial aging. AlMg3 alloy is a solid solution and, therefore, non-age hardenable alloy. Samples taken from different positions along the extrusion direction (ED) and in the transversal direction (TD), i.e. perpendicular to ED were deformed in tension at room temperature (RT) and at an initial strain rate of 4 × 10-4 s-1. The results of AE are related to deformation curves and discussed with respect to microstructural changes during plastic deformation.

Key words
AlMg3 (AA5754) alloy, AlCuMgLi (1441) alloy, acoustic emission, direct extrusion, artificial aging

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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