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Title: Effects of homogenization treatment on recrystallization behavior of 7150 aluminum sheet during post-rolling annealing

Abstract

The effects of two homogenization treatments applied to the direct chill (DC) cast billet on the recrystallization behavior in 7150 aluminum alloy during post-rolling annealing have been investigated using the electron backscatter diffraction (EBSD) technique. Following hot and cold rolling to the sheet, measured orientation maps, the recrystallization fraction and grain size, the misorientation angle and the subgrain size were used to characterize the recovery and recrystallization processes at different annealing temperatures. The results were compared between the conventional one-step homogenization and the new two-step homogenization, with the first step being pretreated at 250 °C. Al{sub 3}Zr dispersoids with higher densities and smaller sizes were obtained after the two-step homogenization, which strongly retarded subgrain/grain boundary mobility and inhibited recrystallization. Compared with the conventional one-step homogenized samples, a significantly lower recrystallized fraction and a smaller recrystallized grain size were obtained under all annealing conditions after cold rolling in the two-step homogenized samples. - Highlights: • Effects of two homogenization treatments on recrystallization in 7150 Al sheets • Quantitative study on the recrystallization evolution during post-rolling annealing • Al{sub 3}Zr dispersoids with higher densities and smaller sizes after two-step treatment • Higher recrystallization resistance of 7150 sheets with two-step homogenization.

Authors:
 [1];  [1];  [2]
  1. Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang, China, 110819 (China)
  2. Department of Applied Science, University of Québec at Chicoutimi, Saguenay, QC G7H 2B1 (Canada)
Publication Date:
OSTI Identifier:
22587130
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 114; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ALUMINIUM; ALUMINIUM ALLOYS; ANNEALING; BACKSCATTERING; ELECTRON DIFFRACTION; GRAIN BOUNDARIES; GRAIN SIZE; RECRYSTALLIZATION; ROLLING; SHEETS

Citation Formats

Guo, Zhanying, Department of Applied Science, University of Québec at Chicoutimi, Saguenay, QC G7H 2B1, Zhao, Gang, and Chen, X. -Grant. Effects of homogenization treatment on recrystallization behavior of 7150 aluminum sheet during post-rolling annealing. United States: N. p., 2016. Web. doi:10.1016/J.MATCHAR.2016.02.008.
Guo, Zhanying, Department of Applied Science, University of Québec at Chicoutimi, Saguenay, QC G7H 2B1, Zhao, Gang, & Chen, X. -Grant. Effects of homogenization treatment on recrystallization behavior of 7150 aluminum sheet during post-rolling annealing. United States. https://doi.org/10.1016/J.MATCHAR.2016.02.008
Guo, Zhanying, Department of Applied Science, University of Québec at Chicoutimi, Saguenay, QC G7H 2B1, Zhao, Gang, and Chen, X. -Grant. 2016. "Effects of homogenization treatment on recrystallization behavior of 7150 aluminum sheet during post-rolling annealing". United States. https://doi.org/10.1016/J.MATCHAR.2016.02.008.
@article{osti_22587130,
title = {Effects of homogenization treatment on recrystallization behavior of 7150 aluminum sheet during post-rolling annealing},
author = {Guo, Zhanying and Department of Applied Science, University of Québec at Chicoutimi, Saguenay, QC G7H 2B1 and Zhao, Gang and Chen, X. -Grant},
abstractNote = {The effects of two homogenization treatments applied to the direct chill (DC) cast billet on the recrystallization behavior in 7150 aluminum alloy during post-rolling annealing have been investigated using the electron backscatter diffraction (EBSD) technique. Following hot and cold rolling to the sheet, measured orientation maps, the recrystallization fraction and grain size, the misorientation angle and the subgrain size were used to characterize the recovery and recrystallization processes at different annealing temperatures. The results were compared between the conventional one-step homogenization and the new two-step homogenization, with the first step being pretreated at 250 °C. Al{sub 3}Zr dispersoids with higher densities and smaller sizes were obtained after the two-step homogenization, which strongly retarded subgrain/grain boundary mobility and inhibited recrystallization. Compared with the conventional one-step homogenized samples, a significantly lower recrystallized fraction and a smaller recrystallized grain size were obtained under all annealing conditions after cold rolling in the two-step homogenized samples. - Highlights: • Effects of two homogenization treatments on recrystallization in 7150 Al sheets • Quantitative study on the recrystallization evolution during post-rolling annealing • Al{sub 3}Zr dispersoids with higher densities and smaller sizes after two-step treatment • Higher recrystallization resistance of 7150 sheets with two-step homogenization.},
doi = {10.1016/J.MATCHAR.2016.02.008},
url = {https://www.osti.gov/biblio/22587130}, journal = {Materials Characterization},
issn = {1044-5803},
number = ,
volume = 114,
place = {United States},
year = {Fri Apr 15 00:00:00 EDT 2016},
month = {Fri Apr 15 00:00:00 EDT 2016}
}