Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 627, Issue -, Pages 374-380Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.01.025
Keywords
Severe plastic deformation (SPD); Accumulative press bonding (APB); Metal matrix nanocomposites (MMNCs); Electron backscatter diffraction (EBSD); Scanning transmission electron microscopy (STEM); Mechanical properties
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Funding
- CICYT (Spain) [MAT2012-38962-C03-01]
- Ministry of Science, Research and Technology of Iran
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Aluminum matrix nanocomposites with 2 vol% ZnO nanoparticles were produced using accumulative press bonding (APB) as a very effective and novel severe plastic deformation process. Microstructural evaluation and mechanical properties of specimens were characterized by field-emission scanning electron microscopy (FE-SEM), scanning transmission electron microscopy (STEM), electron backscatter diffraction (EBSD) and tensile test Microstructure of AA1050/ZnO nanocomposite showed a uniform distribution of ZnO nanoparticles throughout the aluminum matrix. STEM and EBSD observations revealed that ultrafine-grained Al/ZnO nanocomposite with the average grain size of <500 nm and well-developed high angle grain boundaries (80% high angle boundaries and 37 degrees average misorientation angle) was successfully obtained by performing 14 cycles of the APB process. When the number of APB cycles increased the tensile strength of Al/ZnO nanocomposite improved and reached 228 MPa after 14 cycles, which was 2.6 and 13 times greater than the obtained values for annealed (raw material, 88 MPa) and monolithic aluminum (180 MPa), respectively. (C) 2015 Elsevier B.V. All rights reserved.
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