Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 457, Issue 1-2, Pages 244-250Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2007.03.058
Keywords
submicron-Al2O3; magnesium; tensile properties; microstructure; ductility
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In the present study, elemental and 0.3 m size Al2O3 particulates-reinforced magnesium materials were synthesized using disintegrated melt deposition technique followed by hot extrusion. Microstructural characterization of the composite samples showed fairly uniform reinforcement distribution with good reinforcement-matrix interfacial integrity, significant grain refinement and the presence of minimal porosity. Tensile properties characterization revealed that the presence of submicron-Al2O3 reinforcement led to significant improvement in 0.2%YS, and UTS. However, ductility and work of fracture of the composites remain higher with the addition of submicron-Al2O3 Particulates up to 1.1 vol%. The results further revealed that the combination of 0.2% yield strength and UTS exhibited by 0.3 mu m size Al2O3 reinforced magnesium remained much superior even when compared to magnesium reinforced with nano-size Al2O3 and micron size SiC. An attempt is made in the present study to correlate the effect of submicron-Al2O3 as reinforcement and its increasing amount with the microstructural and tensile properties of magnesium. (C) 2007 Elsevier B.V. All rights reserved.
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