Laser-based manufacturing of components using materials with high cracking susceptibility

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Frank Brueckner - , Fraunhofer Institute for Material and Beam Technology (Author)
  • André Seidel - , Chair of Biomaterials, Fraunhofer Institute for Material and Beam Technology, TUD Dresden University of Technology (Author)
  • Ariane Straubel - , Chair of Materials Technology, TUD Dresden University of Technology (Author)
  • Robin Willner - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Christoph Leyens - , Chair of Materials Technology, Fraunhofer Institute for Material and Beam Technology, TUD Dresden University of Technology (Author)
  • Eckhard Beyer - , Chair of Laser and Surface Technology, Fraunhofer Institute for Material and Beam Technology, TUD Dresden University of Technology (Author)

Abstract

Laser metal deposition has been already introduced in various industrial branches, as aviation, energy, medical technology, or tooling. Depending on process conditions of the specific application, powder, wire, or even strips can be used as filler material to coat, and to refurbish as well as to manufacture parts and functional components. Independent from the chosen type of filler material, the deposition has to be in line with specific requirements such as the allowed appearance of porosity, delamination, dilution, or cracking. The latter often becomes rather challenging due to high thermal gradients caused by typical laser-related high energy densities. Relief can be found by hybrid processing as well as suited process regimes yielding in suitable tailored temperature states and crack-free material deposition. Within this paper, such tailored solutions for the manufacturing and processing of materials with a high hot and cold cracking susceptibility such as nickel-based superalloys and alloys based on titanium aluminides are presented. Critical impacts like heating and cooling based on the analysis of melt pool flow and the morphology of solidification are considered. The authors present possibilities to influence, control, and monitor the process. The mechanical properties of corresponding additive manufactured demonstrators will be validated on the basis of destructive and nondestructive testing.

Details

Original languageEnglish
Article number022305
JournalJournal of laser applications
Volume28
Issue number2
Publication statusPublished - May 2016
Peer-reviewedYes

Keywords

Keywords

  • crack prevention, hot and cold cracking, induction, laser additive manufacturing, laser metal deposition, Ni-based superalloys, process control, titanium aluminides