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Laser Powder Bed Fusion Processing of Fe-Mn-Al-Ni Shape Memory Alloy—On the Effect of Elevated Platform Temperatures

Ewald, Felix Clemens
Brenne, Florian
Gustmann, Tobias
Vollmer, Malte
Krooß, Philipp
Niendorf, Thomas

In order to overcome constraints related to crack formation during additive processing (laser powder bed fusion, L-BPF) of Fe-Mn-Al-Ni, the potential of high-temperature L-PBF processing was investigated in the present study. The effect of the process parameters on crack formation, grain structure, and phase distribution in the as-built condition, as well as in the course of cyclic heat treatment was examined by microstructural analysis. Optimized processing parameters were applied to fabricate cylindrical samples featuring a crack-free and columnar grained microstructure. In the course of cyclic heat treatment, abnormal grain growth (AGG) sets in, eventually promoting the evolution of a bamboo like microstructure. Testing under tensile load revealed a well-defined stress plateau and reversible strains of up to 4%.

Sponsor
Gefördert durch den Publikationsfonds der Universität Kassel
Citation
In: Metals Volume 11 / Issue 1 (2021-01-20) , S. ; EISSN 2075-4701
Collections
@article{doi:10.17170/kobra-202103093466,
  author    ={Ewald, Felix Clemens and Brenne, Florian and Gustmann, Tobias and Vollmer, Malte and Krooß, Philipp and Niendorf, Thomas},
  title    ={Laser Powder Bed Fusion Processing of Fe-Mn-Al-Ni Shape Memory Alloy—On the Effect of Elevated Platform Temperatures},
  keywords ={620 and 660 and Rapid Prototyping  and Selektives Laserschmelzen and Memory-Legierung and Wärmebehandlung},
  copyright  ={http://creativecommons.org/licenses/by/4.0/},
  language ={en},
  journal  ={Metals},
  year   ={2021-01-20}
}