Effects of Sn addition on precipitation of a pre-naturally aged Al–Zn–Mg alloy during artificial aging

Yong You Kim; Daniel F.T. Rosenthal; Dongwon Shin; Hyeon Woo Son; Sang Hwa Lee; Young Hee Cho; David N. Seidman; Kwangjun Euh

doi:10.1016/j.matchar.2023.113537

Effects of Sn addition on precipitation of a pre-naturally aged Al–Zn–Mg alloy during artificial aging

Yong You Kim, Daniel F.T. Rosenthal, Dongwon Shin, Hyeon Woo Son, Sang Hwa Lee, Young Hee Cho, David N. Seidman, Kwangjun Euh

Microstructural Evolution Modeling

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2 Scopus citations

Abstract

The effect of Sn addition and pre-natural aging on the artificial aging behavior of Al–Zn–Mg alloy was investigated using both experimental approaches and first principle study. The result shows that Sn retards hardness increase at the initial stage of artificial aging by inhibiting the formation of Guinier-Preston zones (I). Atom probe tomography and density functional theory have revealed that the high binding energy of Mg-Sn disturbs Mg-Zn clustering and delays the formation of Guinier-Preston zones (I). However, the retardation effect of Sn on the artificial aging was found to be suppressed when the pre-natural aging was applied to the Al–Zn–Mg–Sn alloy: hardness at the initial stage increased rapidly compared to the Al–Zn–Mg alloy with pre-natural aging. The reason for the rapid increase of hardness in the Al–Zn–Mg–Sn alloy with pre-natural aging is that Guinier-Preston zones (II) was directly formed from vacancy-rich clusters in the Al–Zn–Mg–Sn alloy in contrast to the Al–Zn–Mg alloy with pre-natural aging. This means Mg-Sn and Zn-rich cluster formed during pre-natural aging can accelerate precipitation kinetic by providing nucleation site for Guinier-Preston zones (II) during artificial aging.

Original language	English
Article number	113537
Journal	Materials Characterization
Volume	207
DOIs	https://doi.org/10.1016/j.matchar.2023.113537
State	Published - Jan 2024

Funding

This work was supported by the Main Research Program [grant numbers PNK9050 and PNK9240 ] funded by the Korea Institute of Materials Science (KIMS, Republic of Korea); and the National R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT [grant number 2020M3H4A310632813 ].

Funders	Funder number
Ministry of Science, ICT and Future Planning	2020M3H4A310632813
Korea Institute of Materials Science
National Research Foundation of Korea

Keywords

Aluminum alloys
Atom probe tomography
Density functional theory
Pre-natural aging
Precipitation

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10.1016/j.matchar.2023.113537

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title = "Effects of Sn addition on precipitation of a pre-naturally aged Al–Zn–Mg alloy during artificial aging",

abstract = "The effect of Sn addition and pre-natural aging on the artificial aging behavior of Al–Zn–Mg alloy was investigated using both experimental approaches and first principle study. The result shows that Sn retards hardness increase at the initial stage of artificial aging by inhibiting the formation of Guinier-Preston zones (I). Atom probe tomography and density functional theory have revealed that the high binding energy of Mg-Sn disturbs Mg-Zn clustering and delays the formation of Guinier-Preston zones (I). However, the retardation effect of Sn on the artificial aging was found to be suppressed when the pre-natural aging was applied to the Al–Zn–Mg–Sn alloy: hardness at the initial stage increased rapidly compared to the Al–Zn–Mg alloy with pre-natural aging. The reason for the rapid increase of hardness in the Al–Zn–Mg–Sn alloy with pre-natural aging is that Guinier-Preston zones (II) was directly formed from vacancy-rich clusters in the Al–Zn–Mg–Sn alloy in contrast to the Al–Zn–Mg alloy with pre-natural aging. This means Mg-Sn and Zn-rich cluster formed during pre-natural aging can accelerate precipitation kinetic by providing nucleation site for Guinier-Preston zones (II) during artificial aging.",

keywords = "Aluminum alloys, Atom probe tomography, Density functional theory, Pre-natural aging, Precipitation",

author = "Kim, {Yong You} and Rosenthal, {Daniel F.T.} and Dongwon Shin and Son, {Hyeon Woo} and Lee, {Sang Hwa} and Cho, {Young Hee} and Seidman, {David N.} and Kwangjun Euh",

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year = "2024",

month = jan,

doi = "10.1016/j.matchar.2023.113537",

language = "English",

volume = "207",

journal = "Materials Characterization",

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T1 - Effects of Sn addition on precipitation of a pre-naturally aged Al–Zn–Mg alloy during artificial aging

AU - Kim, Yong You

AU - Rosenthal, Daniel F.T.

AU - Shin, Dongwon

AU - Son, Hyeon Woo

AU - Lee, Sang Hwa

AU - Cho, Young Hee

AU - Seidman, David N.

AU - Euh, Kwangjun

PY - 2024/1

Y1 - 2024/1

N2 - The effect of Sn addition and pre-natural aging on the artificial aging behavior of Al–Zn–Mg alloy was investigated using both experimental approaches and first principle study. The result shows that Sn retards hardness increase at the initial stage of artificial aging by inhibiting the formation of Guinier-Preston zones (I). Atom probe tomography and density functional theory have revealed that the high binding energy of Mg-Sn disturbs Mg-Zn clustering and delays the formation of Guinier-Preston zones (I). However, the retardation effect of Sn on the artificial aging was found to be suppressed when the pre-natural aging was applied to the Al–Zn–Mg–Sn alloy: hardness at the initial stage increased rapidly compared to the Al–Zn–Mg alloy with pre-natural aging. The reason for the rapid increase of hardness in the Al–Zn–Mg–Sn alloy with pre-natural aging is that Guinier-Preston zones (II) was directly formed from vacancy-rich clusters in the Al–Zn–Mg–Sn alloy in contrast to the Al–Zn–Mg alloy with pre-natural aging. This means Mg-Sn and Zn-rich cluster formed during pre-natural aging can accelerate precipitation kinetic by providing nucleation site for Guinier-Preston zones (II) during artificial aging.

AB - The effect of Sn addition and pre-natural aging on the artificial aging behavior of Al–Zn–Mg alloy was investigated using both experimental approaches and first principle study. The result shows that Sn retards hardness increase at the initial stage of artificial aging by inhibiting the formation of Guinier-Preston zones (I). Atom probe tomography and density functional theory have revealed that the high binding energy of Mg-Sn disturbs Mg-Zn clustering and delays the formation of Guinier-Preston zones (I). However, the retardation effect of Sn on the artificial aging was found to be suppressed when the pre-natural aging was applied to the Al–Zn–Mg–Sn alloy: hardness at the initial stage increased rapidly compared to the Al–Zn–Mg alloy with pre-natural aging. The reason for the rapid increase of hardness in the Al–Zn–Mg–Sn alloy with pre-natural aging is that Guinier-Preston zones (II) was directly formed from vacancy-rich clusters in the Al–Zn–Mg–Sn alloy in contrast to the Al–Zn–Mg alloy with pre-natural aging. This means Mg-Sn and Zn-rich cluster formed during pre-natural aging can accelerate precipitation kinetic by providing nucleation site for Guinier-Preston zones (II) during artificial aging.

KW - Aluminum alloys

KW - Atom probe tomography

KW - Density functional theory

KW - Pre-natural aging

KW - Precipitation

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JO - Materials Characterization

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Effects of Sn addition on precipitation of a pre-naturally aged Al–Zn–Mg alloy during artificial aging

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