Atomic-scale inhomogeneous solute distribution in an ultrahigh strength nanocrystalline Al-8 Mg aluminum alloy

被引：14

作者：

Chen, Yulin ^{[1
]}

Liu, Manping ^{[1
,2
]}

Ding, Lipeng ^{[3
]}

Jia, Zhihong ^{[3
]}

Jia, Shuangfeng ^{[4
]}

Wang, Jianbo ^{[4
]}

Murashkin, Maxim ^{[5
,6
]}

Valiev, Ruslan Z. ^{[5
,6
]}

Roven, Hans J. ^{[7
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China

[2] Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Peoples R China

[3] Nanjing Tech Univ, Key Lab Light weight Mat, Nanjing 211816, Peoples R China

[4] Wuhan Univ, Ctr Electron Microscopy, Sch Phys & Technol, Wuhan 430072, Peoples R China

[5] Ufa Univ Sci & Technol, Inst Phys Adv Mat, 32 Zaki Validi Str, Ufa 450076, Russia

[6] St Petersburg State Univ, 7-9 Univ Skaya Nab, St Petersburg 199034, Russia

[7] Norwegian Univ Sci & Technol NTNU, Dept Mat Sci & Engn, N-7491 Trondheim, Norway

来源：

MATERIALS CHARACTERIZATION | 2023年 / 198卷

基金：

中国国家自然科学基金;

关键词：

Nanocrystalline Al-Mg aluminum alloys; Grain boundaries; Atom probe tomography (APT); High-angle annular dark field (HAADF); Mg solute redistribution; GRAIN-BOUNDARIES; MECHANICAL-PROPERTIES; SEGREGATION; MICROSTRUCTURE; COMPLEXIONS; EVOLUTION;

D O I：

10.1016/j.matchar.2023.112706

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：8

共 31 条

[1] Strength enhancement induced by grain boundary solute segregations in ultrafine-grained alloys [J].

Bobylev, S., V ;

Enikeev, N. A. ;

Sheinerman, A. G. ;

Valiev, R. Z. .

INTERNATIONAL JOURNAL OF PLASTICITY, 2019, 123 :133-144

[2] Effects of solutes on dislocation nucleation from grain boundaries [J].

Borovikov, Valery ;

Mendelev, Mikhail I. ;

King, Alexander H. .

INTERNATIONAL JOURNAL OF PLASTICITY, 2017, 90 :146-155

[3] Simulation of small-angle tilt grain boundaries and their response to stress [J].

Cheng, Yuanfeng ;

Weygand, Daniel ;

Gumbsch, Peter .

COMPUTATIONAL MATERIALS SCIENCE, 2009, 45 (03) :783-787

[4] Application of atom probe tomography in understanding high entropy alloys: 3D local chemical compositions in atomic scale analysis [J].

Hu, Rong ;

Jin, Shenbao ;

Sha, Gang .

PROGRESS IN MATERIALS SCIENCE, 2022, 123

[5] Quantitative measurement of displacement and strain fields from HREM micrographs [J].

Hytch, MJ ;

Snoeck, E ;

Kilaas, R .

ULTRAMICROSCOPY, 1998, 74 (03) :131-146

[6] Quantifying the grain boundary segregation strengthening induced by post-ECAP aging in an Al-5Cu alloy [J].

Jia, Hailong ;

Bjorge, Ruben ;

Cao, Lingfei ;

Song, Hui ;

Marthinsen, Knut ;

Li, Yanjun .

ACTA MATERIALIA, 2018, 155 :199-213

[7] Linear complexions: Confined chemical and structural states at dislocations [J].

Kuzmina, M. ;

Herbig, M. ;

Ponge, D. ;

Sandloebes, S. ;

Raabe, D. .

SCIENCE, 2015, 349 (6252) :1080-1083

[8] Achieving a high-strength binary Mg-15Gd alloy by nano substructure with Gd segregation and nano clusters1 [J].

Li, R. G. ;

Yan, Y. ;

Pan, H. C. ;

Zhang, H. ;

Li, J. R. ;

Qin, G. W. ;

Liu, B. S. .

MATERIALS RESEARCH LETTERS, 2022, 10 (10) :682-689

[9] Phase decomposition in a nanocrystalline CrCoNi alloy [J].

Li, Y. J. ;

Kostka, A. ;

Savan, A. ;

Ludwig, A. .

SCRIPTA MATERIALIA, 2020, 188 :259-263

[10] Evolution of strength and microstructure during annealing of heavily cold-drawn 6.3 GPa hypereutectoid pearlitic steel wire [J].

Li, Y. J. ;

Choi, P. ;

Goto, S. ;

Borchers, C. ;

Raabe, D. ;

Kirchheim, R. .

ACTA MATERIALIA, 2012, 60 (09) :4005-4016

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