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From Powder to Complex-Shaped NiTi Structures by Selective Laser Melting

  • : Bormann, T1
  • : 1School of Life Sciences
  • : PDF Download
  • : 2012

Abstract

Selective laser melting (SLM) is an additive manufacturing technique, which allows the fabrication of a wide variety of three-dimensional geometries by laser-induced melting of powder layers. Complex shapes including porous parts and filigree lattice structures can thereby be created in a single processing step directly from powder. Specimens from the biocompatible shape memory alloy NiTi were produced by means of a SLM system. These specimens exhibit the characteristic pseudoelastic behaviour as well as the one-way shape memory effect [1]. In addition, by varying the processing parameters we locally controlled the phase transition temperatures. Investigations of the specimens' microstructure using optical microscopy reveal the processing route of the laser manufacturing and show an anisotropic microstructure. In sum, the SLM-process is a promising method to build functional medical implants and scaffolds for tissue engineering.
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