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Hot Deformation Behavior Considering Strain Effects and Recrystallization Mechanism of an Al-Zn-Mg-Cu Alloy

The hot deformation behavior of an Al-Zn-Mg-Cu alloy was investigated by hot compression test at deformation temperatures varying from 320 to 440 °C with strain rates ranging from 0.01 to 10 s(−1). The results show that the Mg(Zn, Cu)(2) particles as a result of the sufficient static precipitation p...

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Autores principales: Luo, Lei, Liu, Zhiyi, Bai, Song, Zhao, Juangang, Zeng, Diping, Wang, Jian, Cao, Jing, Hu, Yangcheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7178691/
https://www.ncbi.nlm.nih.gov/pubmed/32283587
http://dx.doi.org/10.3390/ma13071743
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author Luo, Lei
Liu, Zhiyi
Bai, Song
Zhao, Juangang
Zeng, Diping
Wang, Jian
Cao, Jing
Hu, Yangcheng
author_facet Luo, Lei
Liu, Zhiyi
Bai, Song
Zhao, Juangang
Zeng, Diping
Wang, Jian
Cao, Jing
Hu, Yangcheng
author_sort Luo, Lei
collection PubMed
description The hot deformation behavior of an Al-Zn-Mg-Cu alloy was investigated by hot compression test at deformation temperatures varying from 320 to 440 °C with strain rates ranging from 0.01 to 10 s(−1). The results show that the Mg(Zn, Cu)(2) particles as a result of the sufficient static precipitation prior to hot compression have an influence on flow softening. A constitutive model compensated with strain was developed from the experimental results, and it proved to be accurate for predicting the hot deformation behavior. Processing maps at various strains were established. The microstructural evolution demonstrates that the dominant dynamic softening mechanism stems from dynamic recovery (DRV) and partial dynamic recrystallization (DRX). The recrystallization mechanism is continuous dynamic recrystallization (CDRX). The microstructure observations are in good agreement with the results of processing maps. On account of the processing map and microstructural observation, the optimal hot processing parameters at a strain of 0.6 are at deformation temperature range of 390–440 °C and strain rate range of 0.010–0.316 s(−1) with a peak efficiency of 0.390.
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spelling pubmed-71786912020-04-28 Hot Deformation Behavior Considering Strain Effects and Recrystallization Mechanism of an Al-Zn-Mg-Cu Alloy Luo, Lei Liu, Zhiyi Bai, Song Zhao, Juangang Zeng, Diping Wang, Jian Cao, Jing Hu, Yangcheng Materials (Basel) Article The hot deformation behavior of an Al-Zn-Mg-Cu alloy was investigated by hot compression test at deformation temperatures varying from 320 to 440 °C with strain rates ranging from 0.01 to 10 s(−1). The results show that the Mg(Zn, Cu)(2) particles as a result of the sufficient static precipitation prior to hot compression have an influence on flow softening. A constitutive model compensated with strain was developed from the experimental results, and it proved to be accurate for predicting the hot deformation behavior. Processing maps at various strains were established. The microstructural evolution demonstrates that the dominant dynamic softening mechanism stems from dynamic recovery (DRV) and partial dynamic recrystallization (DRX). The recrystallization mechanism is continuous dynamic recrystallization (CDRX). The microstructure observations are in good agreement with the results of processing maps. On account of the processing map and microstructural observation, the optimal hot processing parameters at a strain of 0.6 are at deformation temperature range of 390–440 °C and strain rate range of 0.010–0.316 s(−1) with a peak efficiency of 0.390. MDPI 2020-04-09 /pmc/articles/PMC7178691/ /pubmed/32283587 http://dx.doi.org/10.3390/ma13071743 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Luo, Lei
Liu, Zhiyi
Bai, Song
Zhao, Juangang
Zeng, Diping
Wang, Jian
Cao, Jing
Hu, Yangcheng
Hot Deformation Behavior Considering Strain Effects and Recrystallization Mechanism of an Al-Zn-Mg-Cu Alloy
title Hot Deformation Behavior Considering Strain Effects and Recrystallization Mechanism of an Al-Zn-Mg-Cu Alloy
title_full Hot Deformation Behavior Considering Strain Effects and Recrystallization Mechanism of an Al-Zn-Mg-Cu Alloy
title_fullStr Hot Deformation Behavior Considering Strain Effects and Recrystallization Mechanism of an Al-Zn-Mg-Cu Alloy
title_full_unstemmed Hot Deformation Behavior Considering Strain Effects and Recrystallization Mechanism of an Al-Zn-Mg-Cu Alloy
title_short Hot Deformation Behavior Considering Strain Effects and Recrystallization Mechanism of an Al-Zn-Mg-Cu Alloy
title_sort hot deformation behavior considering strain effects and recrystallization mechanism of an al-zn-mg-cu alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7178691/
https://www.ncbi.nlm.nih.gov/pubmed/32283587
http://dx.doi.org/10.3390/ma13071743
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