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

被引：0
|
作者：
Selbmann, Alex [1 ]
Gruber, Samira [1 ]
Stepien, Lukas [1 ]
Lopez, Elena [1 ]
Marquardt, Axel [1 ,2 ]
Bruckner, Frank [1 ,3 ]
Leyens, Christoph [1 ,2 ]
机构：
[1] Fraunhofer Inst Werkstoff & Strahltech IWS, Winterbergstr 28, D-01277 Dresden, Germany
[2] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany
[3] Lulea Univ Technol, Dept Engn Sci & Math, S-97187 Lulea, Sweden
来源：
LASER 3D MANUFACTURING IX | 2022年 / 11992卷
关键词：
Porous structures; SLM; LPBF; INCONEL; 718; Mechanical properties; Geometric accuracy; Transpiration cooling; Aerospace; Mircochannels;
D O I：
10.1117/12.2608954
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 (R) 718 material and the associated mechanical properties of porous and dense components.
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页数：7
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