Abstract
To study the effect of Ti–B content on the microstructure and mechanical properties of Al-7Si and Al-12.6Si alloys with Al-5Ti-1B content of 0% and 2%, respectively, were prepared through conventional melting and casting route. The microstructure and mechanical properties of as-cast alloys were investigated, and a correlation has been established between microstructural features (shape, size, and area of eutectic Si, SDAS of primary α-Al, inter-spacing between two nearby eutectic Si particles, and hardness) with strength and ductility of as-cast alloys. Results show that Ti content changes the morphology of primary α-Al grain from dendrite to rosette type in Al-7Si alloy and coarse dendrite to fine columnar dendrite in Al-12.6Si alloy. Eutectic Si particle’s shape and size also change with the addition of Ti to the melt. The thermally stable phase Al3Ti is associated with Si and forms the Ti7Al5Si14 phase. Lower SDAS values, finer dendrite α-Al grains, reduce thickness of eutectic Si particles, homogeneous structure, and minimization of casting defects in 2 wt.% Al-5Ti-1B added Al-12.6Si alloy plays a vital role in enhancing the hardness (71 HV), yield strength (YS, 126 MPa), ultimate tensile strength (UTS, 198 MPa).
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References
Yang B, Wang F, Zhang J (2003) Microstructural characterization of in situ TiC/Al and TiC/Al-20Si-5Fe-3Cu-1Mg composites prepared by spray deposition. Acta Mater. 51(17): 4977-4989. https://doi.org/10.1016/S1359-6454(03)00292-1
Jorstad, JJ, Rasmussen, WM (1993) Aluminum Casting Technology. American Foundry Society. 2nd ed. Illinois; Chicago, p 76–77.
Ammar HR, Samuel AM, Samuel FH (2008) Porosity and the Fatigue Behavior of Hypoeutectic and Hypereutectic Aluminum Silicon Casting Alloys. Int. J. Fatigue. 30(6): 1024-1035. https://doi.org/10.1016/j.ijfatigue.2007.08.012
Belov N, Eskin D, Avxentieva N (2005) Constituent Phase Diagrams of the Al-Cu-Fe-Mg-Ni-Si System and Their Application to the Analysis of Aluminium Piston Alloys. Acta Mater. 53(17): 4709-4722. https://doi.org/10.1016/j.actamat.2005.07.003
Rathod NR, Manghani JV (2012) Effect of Modifier and Grain Refiner on Cast Al-7Si Alloy: A Review. Int, J. Emerg. Trends Eng. Develop. 5(2): 574–581.
Choudhary C., Sahoo KL, Roy H, Mandal D (2022) Effect of Grain Refiner on Microstructural Feature Influence Hardness and Tensile Properties of Al-7Si Alloy. J. Mater. Engg. Perform. 31: 3262-3273. https://doi.org/10.1007/s11665-021-06413-9
Kashyap KT, Chandrashekar T (2001) Effects and Mechanisms of Grain Refinement in Aluminium Alloys Bull. Mater. Sci. 24: 345-353. https://doi.org/10.1007/BF02708630
Zeren M, Karakulak E (2008) Influence of Ti Addition on the Microstructure and Hardness Properties of Near-Eutectic Al-Si Alloys. J. Alloys. Compds. 450 (1-2): 255-259. https://doi.org/10.1016/j.jallcom.2006.10.131
Perrot, P (1990) Aluminium-Silicon-Titanium Ternary Alloys-A Comprehensive Compendium of Evaluated Constitution Data and Phase Diagram. V Publishers, New York.
Ghassemalia E, Riestraa M, Bogdanoffa T, Kumar BS, Seifeddinea S (2017) Hall-Petch Equation in a Hypoeutectic Al-Si Cast Alloy: Grain Size vs. Secondary Dendrite Arm Spacing. Proc. Engg. 207: 19-24. https://doi.org/10.1016/j.proeng.2017.10.731
Li Y, Hu B, Liu B, Nie A, Gu Q, Wang J, Li Q (2020) Insight into Si poisoning on grain refinement of Al-Si/Al-5Ti-1B system. Acta Mater. 187: 51–65. https://doi.org/10.1016/j.actamat.2020.01.039
Schumacher P, McKay BJ (2003) TEM investigation of heterogeneous nucleation mechanisms in Al-Si alloys. J. Non-Cryst. Solids 317(1–2): 123–128. https://doi.org/10.1016/S0022-3093(02)01992-0
Qiu D, Taylor JA, Zhang MX, Kelly PM (2007) A mechanism for the poisoning effect of silicon on the grain refinement of Al-Si alloys. Acta Mater. 55(4): 1447-1456. https://doi.org/10.1016/j.actamat.2006.09.046
Iwahashi Y, Wang J, Horita Z, Nemota M, Langdon TG (1996) Principle of equi-channel angular pressing for the processing of ultra-fine-grained materials. Scrip. Mater. 35(2): 143-146. https://doi.org/10.1016/1359-6462(96)00107-8
Yajjala RK, Inampudi NM, Jinugu BR (2020) Correlation between SDAS and mechanical properties of Al–Si alloy made in Sand and Slag moulds. J. Mater. Res. Tech. 9 (3): 6257-6267. https://doi.org/10.1016/j.jmrt.2020.02.066
Choudhary C, Bar HN, Pramanick AK, Sahoo KL, Mandal D (2022) Effect of Strain Induced Melt Activation Process on the Microstructure and Mechanical Properties of Al-5Ti-1B Treated Al-7Si Alloy. Met. Mater. Int. https://doi.org/10.1007/s12540-021-01154-9
Acknowledgements
The authors would like to thank the SERB DST and DST-FIST program, Govt. of India, for providing financial and instrumental support and are obliged to the Director of the National Institute of Technology (NIT), Durgapur, and CSIR-National Metallurgical Laboratory (CSIR-NML), Jamshedpur, for providing the facility to carry out this research work.
Compliance with Ethical Statement The authors declare that they have no conflict of interest.
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Choudhary, C., Sahoo, K.L., Keche, A.J., Mandal, D. (2023). Effect of Ti Addition on the Microstructure and Mechanical Properties of Hypo-Eutectic and Eutectic Al–Si Alloys. In: Broek, S. (eds) Light Metals 2023. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-22532-1_63
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