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The Influence of hydrostatic extrusion on microstructure of 6082 aluminum alloy

Pawel Widlicki 1,  Halina Garbacz 1,  Malgorzata Lewandowska 1,  Waclaw Pachla 2,  Mariusz Kulczyk 2,  Krzysztof J. Kurzydlowski 1

1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
2. Polish Academy of Sciences, Institute of High Pressure Physics (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland

Abstract

Hydrostatic extrusion is one of the SPD methods for fabrication of ultra-fine grained alloys showing a significant increase in mechanical properties such as tensile strength and hardness.
Microstructure and properties of aluminum 6082 alloy after hydrostatic extrusion were investigated. Hydroextrusion was performed in three steps with cumulated true strains 1.34, 2.73 and 3.74 respectively. Microstructure observations were carried out using electron (SEM, TEM) and light microscopy. Within the framework of experiment grain and inclusions size, shape and distribution were investigated. The influence of cumulated true strain value on the microstructure homogeneity was also analyzed. The Hall-Petch relationship was determined for tensile strength and microhardness.

 

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Presentation: poster at E-MRS Fall Meeting 2005, Symposium I, by Pawel Widlicki
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-04-29 13:00
Revised:   2009-06-07 00:44