Surajit Basak, Prosanta Biswas, Surajit Patra, Himadri Roy, and Manas Kumar Mondal, Effect of TiB2 and Al3Ti on Microstructure, Mechanical Properties and Fracture Behaviour of Near Eutectic Al-12.6Si Alloy, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2070-8
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Surajit Basak, Prosanta Biswas, Surajit Patra, Himadri Roy, and Manas Kumar Mondal, Effect of TiB2 and Al3Ti on Microstructure, Mechanical Properties and Fracture Behaviour of Near Eutectic Al-12.6Si Alloy
, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2070-8
Research Article

Effect of TiB2 and Al3Ti on Microstructure, Mechanical Properties and Fracture Behaviour of Near Eutectic Al-12.6Si Alloy

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  • Received: 15 January 2020Revised: 7 April 2020Accepted: 15 April 2020Available online: 16 April 2020
  • Near eutectic 12.6SiAl alloy has been developed with 0 wt%, 2 wt. %, 4 wt.% and 6 wt.% Al-5Ti-1B master alloy. Microstructural morphology, hardness, tensile strength, elongation and fracture behaviour of the alloys have been studied. The unmodified 12.6SiAl alloy has an irregular needle and platy eutectic silicon (ESi) and coarse polygonal primary silicon (PSi) particles in the matrix-like α-Al phase. The PSi, ESi and α-Al morphology and volume fraction have been changed due to the addition of Al-5Ti-1B master alloy. As an effect of microstructure modification, hardness, UTS and % elongation improved. Nano-sized in-situ Al3Ti particles and ex-situ TiB2 particles are the cause of microstructural modification. The fracture images of the developed alloys exhibit a ductile and brittle mode of fracture at the same time. The Al-5Ti-1B modified alloys have a more ductile mode of fracture and dimples compared to the unmodified one.
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