This work analyzed the microstructural and mechanical properties of sintered and hot pressed aluminum alloy AA2014, an aluminum metal matrix composite and an aluminum hybrid metal matrix composite. Sample-1 (AA2014), sample-2 (AA2014 + 5wt% TiB2) and sample-3 (AA2014 + 5 wt% TiB2 + 5 wt% Al2O3) were developed by powder metallurgy. It involves elemental powder mixing and uniaxial green compaction in a 350 MPa universal testing machine followed by sintering in a 550 °C electric muffle furnace for 2 h and hot pressing in a vacuum hot press at nitrogen atmosphere for 2 h at 620 °C. Density assessment, study of microstructure and mechanical characterization were subjected to three samples. For both sintering and hot pressed condition, mechanical and physical properties were analyzed. Samples-1, 2, and 3 display a marginal increase of 1, 1.4 and 1.4% of sintered densities after hot pressing. Sample-1, 2, and 3 porosity were decreased by 15.94, 25 and 22.2% after hot pressing. Improved mechanical properties due to the transfer of load from the matrix to the two reinforcements TiB2 and Al2O3 after hot pressing.
Microstructural and Mechanical Characterization of Sintered and Hot Pressed Hybrid Metal Matrix Composites
Lect.Notes Mechanical Engineering
Innovative Design, Analysis and Development Practices in Aerospace and Automotive Engineering ; Chapter : 44 ; 409-418
2020-09-27
10 pages
Article/Chapter (Book)
Electronic Resource
English
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