Abstract
The Ti–35Nb–7Zr–5Ta (TNZT) alloy is a promising alloy because of its biocompatibility, high specific strength, and low Young’s modulus. This work aimed at investigating the viability to process the TNZT alloy by selective laser melting (SLM) and at optimizing the processing parameters to obtain densified bulk samples. The single-track approach was first used, and the optimized laser parameters were determined to produce bulk samples with a relative density of 99.0% when an energy input of 58.3 J/mm3 was used. The effect of porosity on mechanical properties was studied, and the as-built SLM samples presented slightly lower compressive strength than samples produced by Cu-mould suction casting, as a result of a columnar grain structure in the SLMed samples. Prototypes were manufactured, proving the feasibility of manufacturing parts of the TNZT alloy with complex geometry by SLM.
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Acknowledgments
THe authors thank Dr. K. Kosiba, Dr. U. Kühn, Dr. H. Schwab, Dr. O. Ertugrul, Dr. O. Salman, and Dr. A. Funk for fruitful discussions and E. D’Almeida, B. Bartusch, C. Mix, H. Merker, and S. Donath for technical assistance. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brasil (CAPES)–Finance Code 001. This study was financed by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brasil (CAPES), and German Research Foundation (DFG) through the BRAGECRIM collaboration project (CAPES BEX 7185/13-8 and DFG PA 2275/4-1), and by São Paulo Research Foundation (FAPESP) under the Thematic Project No. 2013/05987-8 and Young Research Project No. 2017/27031-4.
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Batalha, R.L., Batalha, W.C., Deng, L. et al. Processing a biocompatible Ti–35Nb–7Zr–5Ta alloy by selective laser melting. Journal of Materials Research 35, 1143–1153 (2020). https://doi.org/10.1557/jmr.2020.90
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DOI: https://doi.org/10.1557/jmr.2020.90