Synergistic strengthening of Al–SiC composites by nano-spaced SiC-nanowires and the induced high-density stacking faults - Details

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Abstract：

Aluminum　alloys　are　widely　used　in　engineering　structures　due　to　light　weight　and　corrosion　resistance　but　aluminum　has　low　yielding　and　flow　strengths.　Here　we　reported　super-strong　Al-30　vol%SiC　composites　with　a　flow　strength　of　about　1.18　GPa　up　to　a　uniform　strain　of　16.0%.　Micromechanical　tests　revealed　a　flow　strength　of　0.73　GPa　associated　with　the　nano-spaced　SiC　nanowires　strengthening,　and　additional　flow　strength　of　0.45　GPa　associated　with　high-density　stacking　faults　(SFs)　that　are　rarely　formed　and　stabilized　in　Al　due　to　high　stacking　fault　energy　(SFE).　More　surprisingly,　SFs　possess　excellent　thermal　stability　up　to　320　°C　and　can　be　regained　by　thermal　cooling　even　after　they　are　eliminated　during　annealing　at　600　°C.　Microscopy　characterizations　and　theoretical　analysis　revealed　that　thermal　mismatch　induced　high　stress　during　cooling　promotes　the　formation　of　SFs,　and　the　segregation　of　Si　into　SFs　and　dislocation　cores　enables　the　thermal　stability　of　wide　SFs.　This　work　demonstrated　an　approach　to　creating　high-density　and　thermo　stable　SFs　in　high　SFE　metals　via　microstructure-enabled　thermal　stress.　©　2022　Elsevier　Ltd

Keyword：

Aluminum alloys Aluminum corrosion Compression testing Corrosion resistance Corrosion resistant alloys Metallic matrix composites Nanowires Silicon Silicon alloys Silicon carbide Stacking faults Strengthening (metal) Thermodynamic stability

Author Community：

[ 1 ] [Wu, Yiming]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin; 150001, China
[ 2 ] [Zhou, Chang]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin; 150001, China
[ 3 ] [Zhou, Chang]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing; 100083, China
[ 4 ] [Wu, Rui]State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin; 150001, China
[ 5 ] [Sun, Lixin]Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin; 150001, China
[ 6 ] [Lu, Chenyang]School of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an; 710049, China
[ 7 ] [Xiao, Yunzhen]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin; 150001, China
[ 8 ] [Su, Zhengxiong]School of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an; 710049, China
[ 9 ] [Gong, Mingyu]State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China
[ 10 ] [Ming, Kaisheng]State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Materials Science and Engineering, Hebei University of Technology, Tianjin; 300401, China
[ 11 ] [liu, Kai]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin; 150001, China
[ 12 ] [Gu, Chao]Department of Physics, Southern University of Science and Technology, Shenzhen; 518055, China
[ 13 ] [Yang, Wenshu]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin; 150001, China
[ 14 ] [Wang, Jian]Department of Mechanical and Materials Engineering, University of Nebraska–Lincoln, Lincoln; NE; 68583, United States
[ 15 ] [Wu, Gaohui]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin; 150001, China

Reprint Author's Address：

J. Wang;;Department of Mechanical and Materials Engineering, University of Nebraska–Lincoln, Lincoln, 68583, United States;;email: jianwang@unl.edu;;W. Yang;;School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;;email: wugh@hit.edu.cn;;G. Wu;;School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;;email: yws001003@163.com;;

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Source ：

Composites Part B: Engineering

ISSN： 1359-8368

Year： 2023

Volume： 250

9 . 0 7 8

JCR@2020

ESI Discipline： MATERIALS SCIENCE;

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 21

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 13

Affiliated Colleges：

能源与动力工程学院核科学与技术系

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