Processing, Microstructure and Mechanical Properties of Hybrid Materials with Al-Mg Alloy and its Composites

Han Gyoung Cho; Si Young Chang

doi:10.4028/www.scientific.net/MSF.544-545.435

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HomeMaterials Science ForumMaterials Science Forum Vols. 544-545Processing, Microstructure and Mechanical...

Processing, Microstructure and Mechanical Properties of Hybrid Materials with Al-Mg Alloy and its Composites

Abstract:

The hybrid materials with Al-Mg alloy and its composites reinforced with SiC and Al2O3 particles were prepared by conventional powder metallurgy method. The Al-5wt%Mg and composite mixtures were compacted under a pressure of 400MPa and sintered at 873K for 5h. The obtained hybrid materials with Al-Mg/SiCp composite showed the higher relative density than those with Al-Mg/Al2O3 composite after compaction and sintering. In the composite side of hybrid materials, the SiC particles were densely distributed compared to the Al2O3 particles. The hybrid materials with Al-Mg/SiC composite showed higher micro-hardness than those with Al-Mg/Al2O3 composite. The mechanical properties were evaluated by the compressive test. The hybrid materials revealed almost the same value of 0.2% proof stress with Al-Mg alloy. However, their compressive strength was lower than that of Al-Mg alloy, resulting from the fracture occurring along the microinterface between matrix and reinforcements in the macro-interface.

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Materials Science Forum (Volumes 544-545)

Pages:

435-438

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.544-545.435

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Online since:

May 2007

Authors:

Han Gyoung Cho, Si Young Chang

Keywords:

Al₂O₃ Particle, Al-Mg Alloy, Ball Milling, Compressive Property, Density, Hybrid Material, SiC Particles, Sintering Temperature

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