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  4. Laser-based manufacturing of components using materials with high cracking susceptibility
 
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2015
Conference Paper
Title

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

Abstract
Laser metal deposition (LMD) 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 non-destructive testing.
Author(s)
Brückner, Frank  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Seidel, André  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Straubel, Ariane
TU Dresden
Willner, Robin
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Leyens, Christoph  orcid-logo
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Beyer, Eckhard
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Mainwork
ICALEO 2015, 34th International Congress on Applications of Lasers & Electro-Optics. Conference Proceedings. Online resource  
Conference
International Congress on Applications of Lasers & Electro-Optics (ICALEO) 2015  
Language
English
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Keyword(s)
  • laser additive manufacturing

  • laser metal deposition

  • hot and cold cracking

  • Ni-based superalloys

  • titanium aluminides

  • process control

  • induction

  • crack prevention

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