Properties of high specific strength Al-4wt.% Al2O3/B4C nano-composite produced by accumulative roll bonding process
Author
Alizadeh, M.
beni H.A.
Ghaffari, M.
Amini, R.
Date
2013Source Title
Materials and Design
Print ISSN
0261-3069
Publisher
Elsevier Ltd
Volume
50
Pages
427 - 432
Language
English
Type
ArticleItem Usage Stats
105
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Abstract
The influence of nano-scale reinforcement on the mechanical and microstructural properties of ultrafine-grained composites was studied. Al matrix (pure aluminum) composites, with a grain size of 230nm and B4C and Al2O3 reinforcements with an average size of 50nm, were fabricated via the accumulative roll bonding (ARB) process. To evaluate structure and microstructure of the produced composites, X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM) were applied. Mechanical properties of the specimens were investigated by tensile and hardness tests. The result revealed that in comparison with monolithic Al (ARBed Al without ceramic particles), the presence of nano-particles enhances specific strength of composites. Also, the results showed that with increasing ARB cycles, the microhardness of the composites increases. In addition, the specific strength and microhardness of the composite samples are higher than those of the monolithic Al. The density of the composite samples and monolithic Al was measured by the Archimedes method showing that the density decreases in presence of ceramic particles. © 2013 Elsevier Ltd.
Keywords
Mechanical propertiesMetal-matrix composites
Nano-composites
Transmission electron microscopy
Mechanical properties
Metallic matrix composites
Microhardness
Nanocomposites
Reinforcement
Roll bonding
Transmission electron microscopy
X ray diffraction analysis
Accumulative roll bonding
Accumulative roll bonding (ARB) process
High specific strength
Metal matrix composites
Micro-structural properties
Structure and microstructures
Transmission electron microscopy (TEM)
X-ray diffraction analyses (XRD)
Aluminum
Permalink
http://hdl.handle.net/11693/21120Published Version (Please cite this version)
http://dx.doi.org/10.1016/j.matdes.2013.03.018Collections
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