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Structure Property Correlation of Gravity Die-Cast and Rheocast Al–Mg–Sc–Zr in situ Nano-TiB2 Composite

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Abstract

The present study investigates the structure-property relationship of gravity die-cast and rheocast in situ processed 1wt%TiB2/Al-3.5Mg-0.15Sc-0.075Zr composites. The reinforcement was synthesized via the reaction of fluoride salts (K2TiF6 and KBF4) in the melt at 750 °C for an hour. The cooling slope technique was used for rheocasting, wherein the melt (pouring temperature of 700 °C) was allowed to flow over the cooling slope at an angle of 60°. Thereafter, all samples (gravity die cast and rheocast) were aged at 300 °C for 5 h. Microstructural characterization, hardness measurements, tensile tests, and fractography were necessary supplements to this investigation. The results obtained from this investigation infer: (a) The presence of nano-TiB2 particles increases the ductility (15%) of the gravity die-cast specimens; (b) rheocasting increases the strength of the specimen due to transformation from dendritic to equiaxed dendritic morphology and uniform particle distribution (reduced agglomeration). (c) Rheocast and aged specimens show maximum strength and adequate ductility due to the combined effects of structure refinement, reduced agglomeration, and the formation of fine precipitates.

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Acknowledgements

The authors would like to thank the Director, CSIR-CMERI for his approval to conduct the research. The authors would like to extend their thanks to Advanced Casting Research Group CMERI-Durgapur.

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The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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Authors and Affiliations

  1. Materials Mechanics, CSIR-National Metallurgical Laboratory, Jamshedpur, Jharkhand, India

    Surla Ramesh

  2. Department of Mechanical Engineering, Siwan Engineering & Technical Institute, Siwan, Bihar, India

    Sujeet Kumar Gautam

  3. Advanced Casting Research Group, CSIR-Central Mechanical Engineering Research Institute, Durgapur, West Bengal, India

    Himadri Roy, Aditya Kumar Lohar, Sudip Kumar Samanta, Anshu Anand, Diya Mukherjee & Shivam Kumar

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Ramesh, S., Gautam, S.K., Roy, H. et al. Structure Property Correlation of Gravity Die-Cast and Rheocast Al–Mg–Sc–Zr in situ Nano-TiB2 Composite. Inter Metalcast (2023). https://doi.org/10.1007/s40962-023-01223-2

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