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Open AccessArticle

Heating Conditions Influence on Solidification of Inconel 625–WC System for Additive Manufacturing

1
Faculty of Materials Science and Ceramics, Department of Ceramics and Refractories, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
2
Faculty of Metals Engineering and Industrial Computer Science, Department of Surface Engineering and Materials Characterisation, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
*
Author to whom correspondence should be addressed.
Materials 2020, 13(13), 2932; https://doi.org/10.3390/ma13132932
Received: 18 May 2020 / Revised: 21 June 2020 / Accepted: 28 June 2020 / Published: 30 June 2020
In this study, an Inconel 625–tungsten carbide (WC) composite system was investigated by means of microstructure changes affected by both heating rate and WC content. In order to investigate how the system behaves while exposed to fast thermal processing, controlled melting using a differential thermal analysis (DTA) apparatus was performed on the powders. Two WC powders with different average grain size were used to obtain six compositions of Inconel 625–WC powder mixtures (10, 20, and 30 wt.% WC). They were analyzed under 10 and 30 °C/min heating rate in order to obtain composite samples. Results from DTA together with SEM/energy-dispersive X-ray spectroscopy (EDS) microstructural observations allowed observing material changes during solidification. Because of the extensive microsegregation of alloying elements to liquid and their reactions with C, which derived from dissolved WC, the formation of secondary phases with improved microhardness was possible. The collected results provide a better understanding of material behavior during intensive thermal processing which can be useful when designing materials for the laser additive manufacturing technique. View Full-Text
Keywords: Inconel 625; tungsten carbide; differential thermal analysis; microstructural changes; additive manufacturing; laser processing; Inconel 625–WC; metal matrix composites Inconel 625; tungsten carbide; differential thermal analysis; microstructural changes; additive manufacturing; laser processing; Inconel 625–WC; metal matrix composites
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MDPI and ACS Style

Huebner, J.; Rutkowski, P.; Dębowska, A.; Kata, D. Heating Conditions Influence on Solidification of Inconel 625–WC System for Additive Manufacturing. Materials 2020, 13, 2932.

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