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Microstructure and Hardness Properties Investigation of Ti and Nb Added FeNiAlCuCrTi x Nb y High Entropy Alloys

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Abstract

Properties of pure metals can be enhanced by alloying with other metallic or non-metallic elements according to the need. However, as multiple alloying elements in an alloy may lead to the formation of many intermetallic compounds with complex microstructures and poor mechanical properties, new types of metallic alloys called high entropy alloys with at least five elements with equimolar ratios were developed. In this study, FeNiAlCuCrTi x Nb y (x, y = 0, 0.5, 1.0, 1.5) alloys have been prepared using Ar arc melting technique. Microstructural studies using scanning electron microscope and XRD showed that Ti addition promoted secondary BCC2 phase whereas, Nb acted as FCC stabilizer. Samples with combined Nb and Ti addition showed FCC1 and FCC2 structure with Nb-rich FCC2 dendritic phase as dominant phase. Though, individual Nb and Ti additions have resulted in increased hardness, combined additions have resulted in highest hardness of 797 HV under 1 kg load.

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Acknowledgments

The authors would like to thank the MOHE and Universiti Teknologi MARA for financially supporting this research under Grant No. 600-RMI/DANA 5/3/RIF (324/2012).

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Authors and Affiliations

  1. Faculty of Applied Sciences, Universiti Teknologi MARA, 40450, Shah Alam, Selangor, Malaysia

    Rafidah Razuan, Nur Aimi Jani, Mohamad Kamal Harun & Mahesh Kumar Talari

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  1. Rafidah Razuan
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  2. Nur Aimi Jani
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  3. Mohamad Kamal Harun
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  4. Mahesh Kumar Talari
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Corresponding author

Correspondence to Mahesh Kumar Talari.

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Razuan, R., Jani, N.A., Harun, M.K. et al. Microstructure and Hardness Properties Investigation of Ti and Nb Added FeNiAlCuCrTi x Nb y High Entropy Alloys. Trans Indian Inst Met 66, 309–312 (2013). https://doi.org/10.1007/s12666-013-0265-7

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  • DOI: https://doi.org/10.1007/s12666-013-0265-7

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