Effect mechanism of Er content variations on the mechanical and corrosion properties of T6 state Al–Mg–Si-xEr sheets

This work investigates the influence of erbium (Er) content on the microstructure, mechanical properties, and corrosion behavior of T6 state AA6061 sheets. The findings reveal that nanoscale Al(Fe, Mn)Si particles are the main factors hindering dislocation motion and grain boundaries (GBs) migration...

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Main Authors: Cao, Puli, Zhu, Daibo, Wu, Na, Ouyang, Lingxue, Li, Chengbo, Liu, Yang, Zhu, Yulong, Liu, Jirong
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/178422
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1784222024-06-21T15:45:00Z Effect mechanism of Er content variations on the mechanical and corrosion properties of T6 state Al–Mg–Si-xEr sheets Cao, Puli Zhu, Daibo Wu, Na Ouyang, Lingxue Li, Chengbo Liu, Yang Zhu, Yulong Liu, Jirong School of Materials Science and Engineering Engineering Erbium Plasticity This work investigates the influence of erbium (Er) content on the microstructure, mechanical properties, and corrosion behavior of T6 state AA6061 sheets. The findings reveal that nanoscale Al(Fe, Mn)Si particles are the main factors hindering dislocation motion and grain boundaries (GBs) migration. The addition of an appropriate amount of Er (0.6 wt%) effectively inhibits the precipitation of nanoscale Al(Fe, Mn)Si particles, promoting dislocation motion and grain boundary migration, thus significantly enhancing the alloy's plasticity. Furthermore, the sufficient migration of GBs leads to an increase in grain size, significantly reducing the quantity of GBs. This reduces the path for the propagation of corrosion cracks, resulting in improved corrosion resistance. Simultaneously, the addition of an appropriate amount of Er refines the coarse iron-rich phases into short rod-shaped Er-containing iron-rich phases with lower height and potential. This enables the alloy to obtain a more uniform oxide film and significantly reduces the tendency for microgalvanic corrosion, which is conducive to slowing down the initiation of corrosion. However, excessive Er addition (0.8–1.4 wt%) lead to the extensive precipitation of Er-containing iron-rich phases and nanoscale Al(Fe, Mn)Si particles, along with a continuous increase in the number of GBs, adversely affecting the plasticity and corrosion resistance of the alloy. This work offers a new strategy for obtaining 6XXX series alloys with excellent plasticity and corrosion resistance. Published version This study was finally supported by the Science and Technology Innovation Program of Hunan Province, China (2022JJ30570), Hunan Provincial Department of Education-funded research project (23B0180). The Project of the Education Department of Hunan Province, China (Grant No. 20B569), the National Natural Science Foundation of China (52205421) and Guangxi Science and Technology Major Project (AA23023028). 2024-06-19T02:03:08Z 2024-06-19T02:03:08Z 2024 Journal Article Cao, P., Zhu, D., Wu, N., Ouyang, L., Li, C., Liu, Y., Zhu, Y. & Liu, J. (2024). Effect mechanism of Er content variations on the mechanical and corrosion properties of T6 state Al–Mg–Si-xEr sheets. Journal of Materials Research and Technology, 29, 1359-1376. https://dx.doi.org/10.1016/j.jmrt.2024.01.216 2238-7854 https://hdl.handle.net/10356/178422 10.1016/j.jmrt.2024.01.216 2-s2.0-85183455648 29 1359 1376 en Journal of Materials Research and Technology © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/). application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Erbium
Plasticity
spellingShingle Engineering
Erbium
Plasticity
Cao, Puli
Zhu, Daibo
Wu, Na
Ouyang, Lingxue
Li, Chengbo
Liu, Yang
Zhu, Yulong
Liu, Jirong
Effect mechanism of Er content variations on the mechanical and corrosion properties of T6 state Al–Mg–Si-xEr sheets
description This work investigates the influence of erbium (Er) content on the microstructure, mechanical properties, and corrosion behavior of T6 state AA6061 sheets. The findings reveal that nanoscale Al(Fe, Mn)Si particles are the main factors hindering dislocation motion and grain boundaries (GBs) migration. The addition of an appropriate amount of Er (0.6 wt%) effectively inhibits the precipitation of nanoscale Al(Fe, Mn)Si particles, promoting dislocation motion and grain boundary migration, thus significantly enhancing the alloy's plasticity. Furthermore, the sufficient migration of GBs leads to an increase in grain size, significantly reducing the quantity of GBs. This reduces the path for the propagation of corrosion cracks, resulting in improved corrosion resistance. Simultaneously, the addition of an appropriate amount of Er refines the coarse iron-rich phases into short rod-shaped Er-containing iron-rich phases with lower height and potential. This enables the alloy to obtain a more uniform oxide film and significantly reduces the tendency for microgalvanic corrosion, which is conducive to slowing down the initiation of corrosion. However, excessive Er addition (0.8–1.4 wt%) lead to the extensive precipitation of Er-containing iron-rich phases and nanoscale Al(Fe, Mn)Si particles, along with a continuous increase in the number of GBs, adversely affecting the plasticity and corrosion resistance of the alloy. This work offers a new strategy for obtaining 6XXX series alloys with excellent plasticity and corrosion resistance.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Cao, Puli
Zhu, Daibo
Wu, Na
Ouyang, Lingxue
Li, Chengbo
Liu, Yang
Zhu, Yulong
Liu, Jirong
format Article
author Cao, Puli
Zhu, Daibo
Wu, Na
Ouyang, Lingxue
Li, Chengbo
Liu, Yang
Zhu, Yulong
Liu, Jirong
author_sort Cao, Puli
title Effect mechanism of Er content variations on the mechanical and corrosion properties of T6 state Al–Mg–Si-xEr sheets
title_short Effect mechanism of Er content variations on the mechanical and corrosion properties of T6 state Al–Mg–Si-xEr sheets
title_full Effect mechanism of Er content variations on the mechanical and corrosion properties of T6 state Al–Mg–Si-xEr sheets
title_fullStr Effect mechanism of Er content variations on the mechanical and corrosion properties of T6 state Al–Mg–Si-xEr sheets
title_full_unstemmed Effect mechanism of Er content variations on the mechanical and corrosion properties of T6 state Al–Mg–Si-xEr sheets
title_sort effect mechanism of er content variations on the mechanical and corrosion properties of t6 state al–mg–si-xer sheets
publishDate 2024
url https://hdl.handle.net/10356/178422
_version_ 1814047228316090368