Synergetic strengthening effects on copper matrix induced by Al2O3 particle revealed from micro-scale mechanical deformation and microstructure evolutions |
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| Affiliation: | 1. MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi, 710049, China;2. MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi''an Jiaotong University, Xi''an, Shaanxi, 710049, China;3. Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, 48824-1226, USA;1. Zhejiang Provincial Key Laboratory for Cutting Tools, School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, PR China;2. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, P.R. China;3. School of Materials Science and Engineering, Xi''an University of Technology, Xi''an, 710048, P.R. China;1. School of Materials Science and Engineering, Central South University, Changsha, 410083, China;2. Science and Technology on High Strength Structural Materials Laboratory, Central South University, Changsha, 410083, China;3. State Key Laboratory for Powder Metallurgy, Central South University, Changsha, 410083, China;4. Key Laboratory of Non-ferrous Metal Materials Science and Engineering, Ministry of Education, Changsha, 410083, China;1. JWRI, Osaka University, 11-1 Mihogaoka, Ibaraki, 567-0047, Osaka, Japan;2. Kocaeli University, Engineering Faculty, Metallurgical and Materials Engineering Department, Kocaeli, Turkey;3. Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia;1. Institute of Advanced Materials Technology, The Northeastern University, Shenyang, 110819, China;2. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, The Northeastern University, Shenyang, 110819, China;3. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;4. Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;1. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, PR China;2. Institute of Engineering Research, Jiangxi University of Science and Technology, Ganzhou 341000, PR China;1. Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China;2. Department of Chemical Engineering, Polytechnique Montreal, Montreal, Quebec, H3C 3A7, Canada |
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| Abstract: | The micro-scale effect of Al2O3 particle on the deformation behaviors of the copper matrix was investigated using nanoindentation. Moderate strengthening effects were produced by the Al2O3 as indicated from the mechanical deformation evolutions. Specifically, the displacement recovery ratio and elastic work ratio is 6% and 9% higher for the Cu-5 wt% Al2O3 (C5A) composite material compared with that of the pure copper (PC) material, respectively. While for the indentation hardness and indentation modulus, the increment is 36% and 75%, respectively. Notably, the moderate strengthening effects were quantitatively illuminated from the power law index m for the C5A indent (1.2) and PC indent (1.1–1.3). In addition, synergetic strengthening effects were proposed from the microstructure evolutions in the C5A composite material. Specifically, the increment in yield strength deduced from the grain refinement is 120 MPa, which is 67% higher than that of the Al2O3 particle dispersion strengthening. The synergetic strengthening effects revealed from the microstructure evolutions are expected to provide new strengthening approaches for the ceramic particle reinforced metal matrix composite materials. |
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| Keywords: | Synergetic strengthening Micro-scale evolutions Nanoindentation Grain refinement Dispersion strengthening |
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