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Microstructure and Mechanical Properties of Ti-Mo-Zr-Cr Biomedical Alloys by Powder Metallurgy

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Titanium and its alloys have been widely used as biometals due to their excellent biocompatibility, corrosion resistance and moderate mechanical properties. Ti-15Mo-6Zr-based alloys and a series of Ti-15Mo-6Zr-xCr (x = 1, 2, 3, 4 wt.%) alloys were designed and fabricated by powder metallurgy for the first time to develop novel biomedical materials. The microstructure, internal porosity and mechanical properties of the sintered Ti-15Mo-6Zr and Ti-15Mo-6Zr-xCr alloys were investigated using scanning electronic microscopy (SEM) and bending and compression tests. The experimental results indicated that the microstructure and mechanical properties of these alloys changed as different Cr levels were added. The addition of small Cr levels further increased the β-phase stability, improving the properties of the Ti-15Mo-6Zr-xCr alloy. However, all of the alloys had good ductility, and the Ti-15Mo-6Zr-2Cr alloy had lower bending and compression moduli (31 and 23 GPa, respectively) than the Ti-15Mo-6Zr-based alloys (40 and 36 GPa, respectively). Moreover, the Ti-15Mo-6Zr-2Cr alloys exhibited higher bending and compression strength/modulus ratios, which were as large as 48.4 and 52.2, respectively; these were higher than those of the Ti-15Mo-6Zr-based alloy (41.3 and 33.6, respectively). In the search for a better implant material, β phase Ti-15Mo-6Zr-2Cr, with its low modulus, ductile properties and reasonably high strength, is a promising candidate.

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Acknowledgments

The authors thank the Ministry of Economy and Competitiveness for financially supporting the research project MAT2014-53764-C3-1-R and the European Commission through the Erasmus Mundus scholarship program WELCOME. The European Commission via FEDER funds allowed for the purchase of equipment for research and Microscopy Service of the Polytechnic University of Valencia.

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Authors and Affiliations

  1. Institute of Materials Technology (ITM), University Polytechnic of Valencia (UPV), Valencia, Spain

    Abou Bakr Elshalakany, A. Amigó Mata, P. Mohan & V. Amigó Borrás

  2. Production Engineering and Printing Technology Department, Akhbar El Yom Academy, Giza, Egypt

    Abou Bakr Elshalakany & Shady Ali

  3. Mechanical Design and Production Engineering Department, Cairo University, Giza, Egypt

    T. A. Osman

  4. Electronics Research Institute, Giza, Egypt

    Ashraf K. Eessaa

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  1. Abou Bakr Elshalakany
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Correspondence to Abou Bakr Elshalakany.

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Elshalakany, A.B., Ali, S., Amigó Mata, A. et al. Microstructure and Mechanical Properties of Ti-Mo-Zr-Cr Biomedical Alloys by Powder Metallurgy. J. of Materi Eng and Perform 26, 1262–1271 (2017). https://doi.org/10.1007/s11665-017-2531-z

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  • DOI: https://doi.org/10.1007/s11665-017-2531-z

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