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Microstructure, thermal and mechanical response of AZ51/Al2O3 nanocomposite with 2wt.% Ca addition
Graphical abstract Tensile properties of AZ51, AZ51–Al2O3 and AZ51–Al2O3–2Ca nanocomposites. Display Omitted Highlights ► New AZ51–Al2O3 and AZ51–Al2O3–2Ca magnesium nanocomposites are developed. ► Better microstructural properties have been found with the addition of Ca into AZ51–Al2O3 nanocomposites. ► CTE and microhardness of AZ51–Al2O3 nanocomposite improves with Ca addition. ► Newly developed AZ51–Al2O3–2Ca nanocomposites exhibit good overall mechanical properties.
Abstract In the present study, new AZ51/Al2O3–2Ca magnesium nanocomposite was successfully synthesized by simultaneously adding 2wt.% aluminum, 2wt.% Ca and 1.5vol.% nanosized Al2O3 (50nm) into AZ31 matrix using a disintegrated melt deposition (DMD) technique. AZ51/Al2O3 nanocomposite was developed following the same processing route except adding Ca. Composite samples were then subsequently hot extruded at 400°C and characterized. Microstructural characterization studies revealed equiaxed grain size, reasonably uniform distribution of intermetallics and nanoparticulates in the matrix and minimal porosity. Results also showed that the addition of Ca into AZ51/Al2O3 nanocomposite helped to reduce the average grain size and introduced (Mg,Al)2Ca second phase. Physical properties characterization revealed that addition of Ca reduced the coefficient of thermal expansion (CTE) when compared to Ca free nanocomposite. Ca addition also assisted in improving overall mechanical properties including microhardness, 0.2% yield strength, ultimate tensile strength, and work of fracture while the ductility was compromised.
Microstructure, thermal and mechanical response of AZ51/Al2O3 nanocomposite with 2wt.% Ca addition
Graphical abstract Tensile properties of AZ51, AZ51–Al2O3 and AZ51–Al2O3–2Ca nanocomposites. Display Omitted Highlights ► New AZ51–Al2O3 and AZ51–Al2O3–2Ca magnesium nanocomposites are developed. ► Better microstructural properties have been found with the addition of Ca into AZ51–Al2O3 nanocomposites. ► CTE and microhardness of AZ51–Al2O3 nanocomposite improves with Ca addition. ► Newly developed AZ51–Al2O3–2Ca nanocomposites exhibit good overall mechanical properties.
Abstract In the present study, new AZ51/Al2O3–2Ca magnesium nanocomposite was successfully synthesized by simultaneously adding 2wt.% aluminum, 2wt.% Ca and 1.5vol.% nanosized Al2O3 (50nm) into AZ31 matrix using a disintegrated melt deposition (DMD) technique. AZ51/Al2O3 nanocomposite was developed following the same processing route except adding Ca. Composite samples were then subsequently hot extruded at 400°C and characterized. Microstructural characterization studies revealed equiaxed grain size, reasonably uniform distribution of intermetallics and nanoparticulates in the matrix and minimal porosity. Results also showed that the addition of Ca into AZ51/Al2O3 nanocomposite helped to reduce the average grain size and introduced (Mg,Al)2Ca second phase. Physical properties characterization revealed that addition of Ca reduced the coefficient of thermal expansion (CTE) when compared to Ca free nanocomposite. Ca addition also assisted in improving overall mechanical properties including microhardness, 0.2% yield strength, ultimate tensile strength, and work of fracture while the ductility was compromised.
Microstructure, thermal and mechanical response of AZ51/Al2O3 nanocomposite with 2wt.% Ca addition
Alam, Md. Ershadul (author) / Hamouda, Abdel Magid Salem (author) / Gupta, Manoj (author)
2013-01-17
6 pages
Article (Journal)
Electronic Resource
English
Microstructure, thermal and mechanical response of AZ51/Al2O3 nanocomposite with 2 wt.% Ca addition
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