Research output: Contribution to journal › Article › peer-review
Atomic-scale inhomogeneous solute distribution in an ultrahigh strength nanocrystalline Al-8 Mg aluminum alloy. / Chen, Yulin ; Liu, Manping; Jia, Zhihong; Ding, Lipeng; Wang, Jianbo ; Jia, Shuangfeng; Мурашкин, Максим Юрьевич; Валиев, Руслан Зуфарович; Roven, Hans J. .
In: Materials Characterization, Vol. 198, 112706, 04.2023.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Atomic-scale inhomogeneous solute distribution in an ultrahigh strength nanocrystalline Al-8 Mg aluminum alloy
AU - Chen, Yulin
AU - Liu, Manping
AU - Jia, Zhihong
AU - Ding, Lipeng
AU - Wang, Jianbo
AU - Jia, Shuangfeng
AU - Мурашкин, Максим Юрьевич
AU - Валиев, Руслан Зуфарович
AU - Roven, Hans J.
PY - 2023/4
Y1 - 2023/4
N2 - Exploring the redistribution mechanism of Mg from the perspective of experimental observation has been a long-term yet challenging attempt in Al-Mg alloys. Here we demonstrate a simple but effective approach to obtain non-uniform Mg solute distribution (i.e., Mg-enriched/depletion zones) around typical grain boundaries (GBs) in a nanocrystalline Al-8 Mg alloy. This abnormal segregation was detected by both high-angle annular dark-field scanning transmission electron microscopy and atom probe tomography. The results show that local strain and GB migration during deformation leads to spatially inhomogeneous Mg solute distribution around the GBs. Both the non-uniform distribution and the broadened GBs can hinder GB migration and dislocation motion, thus enhance the strength. An inhomogeneous solute distribution mechanism of Mg atoms is proposed based on the extensive investigations. This study may help with developing new strengthening mechanisms of nanocrystalline materials
AB - Exploring the redistribution mechanism of Mg from the perspective of experimental observation has been a long-term yet challenging attempt in Al-Mg alloys. Here we demonstrate a simple but effective approach to obtain non-uniform Mg solute distribution (i.e., Mg-enriched/depletion zones) around typical grain boundaries (GBs) in a nanocrystalline Al-8 Mg alloy. This abnormal segregation was detected by both high-angle annular dark-field scanning transmission electron microscopy and atom probe tomography. The results show that local strain and GB migration during deformation leads to spatially inhomogeneous Mg solute distribution around the GBs. Both the non-uniform distribution and the broadened GBs can hinder GB migration and dislocation motion, thus enhance the strength. An inhomogeneous solute distribution mechanism of Mg atoms is proposed based on the extensive investigations. This study may help with developing new strengthening mechanisms of nanocrystalline materials
KW - Nanocrystalline Al-Mg aluminum alloys
KW - Grain boundaries
KW - Atom probe tomography
KW - High-angle annular dark field
KW - Mg solute redistribution
KW - Atom probe tomography (APT)
KW - High-angle annular dark field (HAADF)
UR - https://www.mendeley.com/catalogue/eff0fb54-bee5-3845-9070-3fb0b821c746/
U2 - 10.1016/j.matchar.2023.112706
DO - 10.1016/j.matchar.2023.112706
M3 - Article
VL - 198
JO - Materials Characterization
JF - Materials Characterization
SN - 1044-5803
M1 - 112706
ER -
ID: 103944640