Abstract
The prime objective of this study is an investigation on the effects of mechanical milling process, incorporation of silicon carbide reinforcement phase and different amounts and types of coarse-grained aluminum powders (30 and 50 wt% unmilled Al5083 and Al2024) on microstructure, mechanical properties and fracture behavior of trimodal SiC reinforced Al5083/Al2024 aluminum alloy matrix nanocomposites. These composites were prepared through mechanical milling and hot extrusion processes. Results indicated that nanocrystalline structures of Al5083 alloy and Al5083–5 wt%SiC composite powders were formed during mechanical milling time of 50 h. Al5083–5 wt%SiC nanocomposite sample revealed strength and hardness superior to the coarse-grained aluminum sample. However, its elongation decreased down to a minimum value of 0.98%. Addition of 30 wt% unmilled Al2024 particles to the nanocomposite powder caused considerable improvement in the ductility, slight decrease in strength and hardness values and change in fracture mechanism from brittle to brittle-ductile mode, compared to that of Al5083–5 wt%SiC nanocomposite sample.
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Alizadeh, A., Eslami, M. & Babaee, M.H. Investigation on Microstructure, Mechanical Properties and Fracture Mechanism of Trimodal SiC Reinforced Al5083/Al2024 Aluminum Alloy Based Nanocomposites Fabricated by Mechanical Milling and Hot Extrusion Processes. Trans Indian Inst Met 71, 2325–2338 (2018). https://doi.org/10.1007/s12666-018-1364-2
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DOI: https://doi.org/10.1007/s12666-018-1364-2