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Technologies 2016, 4(4), 37;

Effect of Particle Size on Microstructure and Mechanical Properties of Al-Based Composite Reinforced with 10 Vol.% Mechanically Alloyed Mg-7.4%Al Particles

Institute of Minerals and Materials Technology (IMMT), Bhubaneshwar 751013, India
Leibniz Institute for Solid State and Materials Research (IFW Dresden), Institute for Complex Materials, Postfach 270116, D-01171 Dresden, Germany
Department of Metallurgical Engineering, Indian Institute of Technology, Varanasi 221005, India
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
Solidification Processes and Complex Structures, Institute for Complex Materials, IFW Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany
Department Materials Physics, Montanuniversität Leoben, Jahnstraße 12, A-8700 Leoben, Austria
Author to whom correspondence should be addressed.
Academic Editor: Anders E. W. Jarfors
Received: 20 August 2016 / Revised: 15 November 2016 / Accepted: 16 November 2016 / Published: 19 November 2016
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The effect of Mg-7.4%Al reinforcement particle size on the microstructure and mechanical properties in pure Al matrix composites was investigated. The samples were prepared by hot consolidation using 10 vol.% reinforcement in different size ranges, D, 0 < D < 20 µm (0–20 µm), 20 ≤ D < 40 µm (20–40 µm), 40 ≤ D < 80 µm (40–80 µm) and 80 ≤ D < 100 µm (80–100 µm). The result reveals that particle size has a strong influence on the yield strength, ultimate tensile strength and percentage elongation. As the particle size decreases from 80 ≤ D < 100 µm to 0 < D < 20 µm, both tensile strength and ductility increases from 195 MPa to 295 MPa and 3% to 4% respectively, due to the reduced ligament size and particle fracturing. Wear test results also corroborate the size effect, where accelerated wear is observed in the composite samples reinforced with coarse particles. View Full-Text
Keywords: composite materials; particles size; consolidation; strength composite materials; particles size; consolidation; strength

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Chaubey, A.K.; Konda Gokuldoss, P.; Wang, Z.; Scudino, S.; Mukhopadhyay, N.K.; Eckert, J. Effect of Particle Size on Microstructure and Mechanical Properties of Al-Based Composite Reinforced with 10 Vol.% Mechanically Alloyed Mg-7.4%Al Particles. Technologies 2016, 4, 37.

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