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Lecture

Microstructure and texture evolution in laboratory scaled production of aluminum sheets

Wednesday (06.11.2019)
17:00 - 17:20
Part of:


The far-reaching effects of the different texture components on material-specific characteristics give impetus to develop a profound understanding of the texture development. Investigation of the effect of alloy modifications and variation of processing parameters is often not possible in a systematic manner for industrial scales. For this, laboratory-scale production is invaluable, since the effects on the texture can be more easily analyzed. The presented research focuses on the fundamental characterization of the emerging microstructure and texture of samples produced on laboratory-scale facilities. Based on two standard Al alloys (EN AW-5182 and EN AW-6016), different process routes are tracked. Laboratory-scale production started with the remelting of the standard alloys and casting into different molds with adjustable cooling rates. Subsequently, laboratory rolling mills of different scales are used. A potential comparison to industrial produced Al sheets is discussed. The first results point to difficulties regarding the direct comparability of industrial and laboratory sheets. Due to differences e.g. in roll diameter, rolling force or speed, differences in the sheet texture are recognized.

Laboratory-scale production can however be perfectly used to study the underlying mechanisms of microstructure and texture development and its interferences with the alloy and its condition. Therefore, further research focuses on the investigation of microstructural effects on grain orientations. The effects of particle stimulated nucleation from bigger precipitates and orientation pinning by dispersoids will be analyzed in the laboratory-scale products. From the acquired knowledge, modifications in the industrial process should contribute to the production of improved aluminum alloys.

 

Speaker:
Dipl.-Ing. Jakob Grasserbauer
Montanuniversität Leoben
Additional Authors:
  • Dr. Irmgard Weißensteiner
    Montanuniversität Leoben
  • Prof. Dr. Stefan Pogatscher
    Montanuniversität Leoben