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Tailoring Selective Laser Melting Process Parameters for NiTi Implants

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Abstract

Complex-shaped NiTi constructions become more and more essential for biomedical applications especially for dental or cranio-maxillofacial implants. The additive manufacturing method of selective laser melting allows realizing complex-shaped elements with predefined porosity and three-dimensional micro-architecture directly out of the design data. We demonstrate that the intentional modification of the applied energy during the SLM-process allows tailoring the transformation temperatures of NiTi entities within the entire construction. Differential scanning calorimetry, x-ray diffraction, and metallographic analysis were employed for the thermal and structural characterizations. In particular, the phase transformation temperatures, the related crystallographic phases, and the formed microstructures of SLM constructions were determined for a series of SLM-processing parameters. The SLM-NiTi exhibits pseudoelastic behavior. In this manner, the properties of NiTi implants can be tailored to build smart implants with pre-defined micro-architecture and advanced performance.

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Acknowledgements

The multi-disciplinary team gratefully acknowledges the financial support of the Swiss National Science Foundation within the research program NRP 62 “Smart Materials.”

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Authors and Affiliations

  1. Institute for Medical and Analytical Technologies, University of Applied Sciences Northwestern Switzerland, Gründenstrasse 40, 4132, Muttenz, Switzerland

    Therese Bormann, Ralf Schumacher & Michael de Wild

  2. Biomaterials Science Center, University of Basel, c/o University Hospital Basel, 4031, Basel, Switzerland

    Therese Bormann & Bert Müller

  3. Memry GmbH, Am Kesselhaus 5, 79576, Weil am Rhein, Germany

    Matthias Mertmann

Authors
  1. Therese Bormann
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  2. Ralf Schumacher
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  3. Bert Müller
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  4. Matthias Mertmann
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  5. Michael de Wild
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Corresponding author

Correspondence to Michael de Wild.

Additional information

This article is an invited paper selected from presentations at the International Conference on Shape Memory and Superelastic Technologies 2011, held November 6-9, 2011, in Hong Kong, China, and has been expanded from the original presentation.

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Bormann, T., Schumacher, R., Müller, B. et al. Tailoring Selective Laser Melting Process Parameters for NiTi Implants. J. of Materi Eng and Perform 21, 2519–2524 (2012). https://doi.org/10.1007/s11665-012-0318-9

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  • DOI: https://doi.org/10.1007/s11665-012-0318-9

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