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Microstructural Study of a Mg–Zn–Zr Alloy Hot Compressed at a High Strain Rate
Understanding the correlation of plasticity with deformation and dynamic recrystallization (DRX) behaviors, in magnesium (Mg) alloys deformed under high-strain-rate conditions, is increasingly important for wrought Mg processing. In the present study, a ZK30 (Mg-2.61%Zn-0.66%Zr by weight percent (wt...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7287677/ https://www.ncbi.nlm.nih.gov/pubmed/32443743 http://dx.doi.org/10.3390/ma13102348 |
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author | You, Jing Huang, Yingjie Liu, Chuming Zhan, Hongyi Huang, Lixin Zeng, Guang |
author_facet | You, Jing Huang, Yingjie Liu, Chuming Zhan, Hongyi Huang, Lixin Zeng, Guang |
author_sort | You, Jing |
collection | PubMed |
description | Understanding the correlation of plasticity with deformation and dynamic recrystallization (DRX) behaviors, in magnesium (Mg) alloys deformed under high-strain-rate conditions, is increasingly important for wrought Mg processing. In the present study, a ZK30 (Mg-2.61%Zn-0.66%Zr by weight percent (wt.%)) alloy in the as-forged state was hot compressed to various strain levels at a temperature of 350 °C and a strain rate of 10 s(−1). Heterogeneous deformation and dynamic recrystallization (DRX) behaviors of the complicated microstructures in the deformed samples were analyzed via a grain-partitioning approach based on intra-grain misorientation analysis from electron back-scattered diffraction (EBSD). The ZK30 alloy showed excellent formability, remaining intact at a true strain of −1.11. Continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) via grain boundary corrugation/bulging are the dominant mechanisms for the relaxation of strain energy during hot compression. Initial Zr-rich coarse grains undertook a significant portion of the plastic strain as the compression progressed, reflected by the increased misorientations within their interior and marked change in their aspect ratios. The results indicate that the excellent plasticity of the as-forged ZK30 alloy can be attributed to the operative CDRX mechanisms and the reduced deformation anisotropy of Zr-rich coarse grains containing Zn–Zr nano–precipitates. |
format | Online Article Text |
id | pubmed-7287677 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-72876772020-06-15 Microstructural Study of a Mg–Zn–Zr Alloy Hot Compressed at a High Strain Rate You, Jing Huang, Yingjie Liu, Chuming Zhan, Hongyi Huang, Lixin Zeng, Guang Materials (Basel) Article Understanding the correlation of plasticity with deformation and dynamic recrystallization (DRX) behaviors, in magnesium (Mg) alloys deformed under high-strain-rate conditions, is increasingly important for wrought Mg processing. In the present study, a ZK30 (Mg-2.61%Zn-0.66%Zr by weight percent (wt.%)) alloy in the as-forged state was hot compressed to various strain levels at a temperature of 350 °C and a strain rate of 10 s(−1). Heterogeneous deformation and dynamic recrystallization (DRX) behaviors of the complicated microstructures in the deformed samples were analyzed via a grain-partitioning approach based on intra-grain misorientation analysis from electron back-scattered diffraction (EBSD). The ZK30 alloy showed excellent formability, remaining intact at a true strain of −1.11. Continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) via grain boundary corrugation/bulging are the dominant mechanisms for the relaxation of strain energy during hot compression. Initial Zr-rich coarse grains undertook a significant portion of the plastic strain as the compression progressed, reflected by the increased misorientations within their interior and marked change in their aspect ratios. The results indicate that the excellent plasticity of the as-forged ZK30 alloy can be attributed to the operative CDRX mechanisms and the reduced deformation anisotropy of Zr-rich coarse grains containing Zn–Zr nano–precipitates. MDPI 2020-05-20 /pmc/articles/PMC7287677/ /pubmed/32443743 http://dx.doi.org/10.3390/ma13102348 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 You, Jing Huang, Yingjie Liu, Chuming Zhan, Hongyi Huang, Lixin Zeng, Guang Microstructural Study of a Mg–Zn–Zr Alloy Hot Compressed at a High Strain Rate |
title | Microstructural Study of a Mg–Zn–Zr Alloy Hot Compressed at a High Strain Rate |
title_full | Microstructural Study of a Mg–Zn–Zr Alloy Hot Compressed at a High Strain Rate |
title_fullStr | Microstructural Study of a Mg–Zn–Zr Alloy Hot Compressed at a High Strain Rate |
title_full_unstemmed | Microstructural Study of a Mg–Zn–Zr Alloy Hot Compressed at a High Strain Rate |
title_short | Microstructural Study of a Mg–Zn–Zr Alloy Hot Compressed at a High Strain Rate |
title_sort | microstructural study of a mg–zn–zr alloy hot compressed at a high strain rate |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7287677/ https://www.ncbi.nlm.nih.gov/pubmed/32443743 http://dx.doi.org/10.3390/ma13102348 |
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