中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 29 No. 5 May 2019 |
（1. TU Bergakademie Freiberg, Institut für Metallformung, Bernhard-von-Cotta-Str. 4, 09599 Freiberg, Germany;
2. Samara State Aerospace University, Samara National Research University, MoskovskoyeShosse 34, 443086 Samara, Russia;
3. Hydro Aluminium Rolled Products GmbH, Research and Development, D-53117 Bonn, Germany;
4. St. Petersburg Mining University, Institute of Automation of Manufacturing Processes, 2, 21st Line, St Petersburg 199106, Russia）
Abstract:The objective of the investigation is to evaluate the influence of the Zener-Hollomon parameter on substructure and texture evolution in iron-containing wrought aluminium alloys (type AA8011). Methods applied are X-ray texture analysis, electron backscatter diffraction (EBSD) and optical microscopy. The results show a serious impact of the Zener-Hollomon parameter on cube texture evolution during the thermomechanical treatment in iron-containing aluminium alloys. An increase in the Zener-Hollomon parameter reduces the survivability of cube texture during hot deformation and reinforces particle-stimulated nucleation (PSN) during the annealing process. However, thermomechanical treatment at low temperatures leads to active precipitation and as a result fine-dispersed participles tend to block all nuclei except for those producing large cube-oriented grains. It is concluded that in iron-containing wrought aluminium alloys, the general correlation between the Zener-Hollomon parameter and subgrain size is similar to that observed in 3xxx series alloys and can be described by the specific set of equations derived.
Key words: aluminium alloy; texture; Zener-Hollomon parameter; substructure; hot rolling
