Mechanical and geometrical characterization of additively manufactured INCONEL® 718 porous structures for transpiration cooling in space applications

Alex Selbmann; Samira Gruber; Lukas Stepien; Elena López; Axel Marquardt; Frank Brückner; Christoph Leyens

doi:10.1117/12.2608954

4 March 2022 Mechanical and geometrical characterization of additively manufactured INCONEL® 718 porous structures for transpiration cooling in space applications

Alex Selbmann, Samira Gruber, Lukas Stepien, Elena López, Axel Marquardt, Frank Brückner, Christoph Leyens

Author Affiliations +

Proceedings Volume 11992, Laser 3D Manufacturing IX; 1199206 (2022) https://doi.org/10.1117/12.2608954
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

The need for ever increasing process temperatures during combustion in space engines and gas turbines to increase efficiency requires the use of thermally resistant materials and novel cooling solutions. For the improved cooling of thermally highly stressed components, the technology of transpiration cooling, in which a cooling medium flows through a porous structure, has been known for a long time. Additive manufacturing and, in particular, laser powder bed fusion (LPBF) offers great potential for the near-net-shape production of porous structures compared to complex conventional manufacturing. In this contribution, porous structures were manufactured and the process parameters were optimized to increase the quality of the pores. The study discloses an adapted exposure parameter set for the improved fabrication of cylindrical pores in an INCONEL® 718 material and the associated mechanical properties of porous and dense components.

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Alex Selbmann, Samira Gruber, Lukas Stepien, Elena López, Axel Marquardt, Frank Brückner, and Christoph Leyens "Mechanical and geometrical characterization of additively manufactured INCONEL® 718 porous structures for transpiration cooling in space applications", Proc. SPIE 11992, Laser 3D Manufacturing IX, 1199206 (4 March 2022); https://doi.org/10.1117/12.2608954

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