MORPHOLOGY AND CHEMICAL COMPOSITION OF INCONEL 686 AFTER HIGH-TEMPERATURE CORROSION

1 KOCLĘGA Damian
Co-authors:
1 RADZISZEWSKA Agnieszka 2 KRANZMANN Axel 1 MARYNOWSKI Przemysław 1 WOŹNY Krzysztof
Institutions:
1 AGH University of Science and Technology, Cracow, Poland, EU, dkoclega@agh.edu.pl
2 Federal Institute for Materials Research and Testing - BAM, Berin, Germany, EU, axel.kranzmann@bam.de
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1010-1015
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
21 views / 3 downloads
Abstract

The work presents the microstructure, chemical composition and mechanical properties of Inconel 686 coatings after high - temperature corrosion in environment of aggressive gases and ashes. To produce the Ni - based coatings the QS Nd:YAG laser cladding process was carried out. As the substrate used 13CrMo4-5 boilers plate steel. Ni - base alloys characterize the excellent high-temperature corrosion resistance, good strength and ability to work in aggressive environments. Formed clad were characterized by high quality of metallurgical bonding with the substrate material and sufficiently low amount of the iron close to the clad layer surface. After corrosion experiment the oxide scale on the substrate and clad created. The scale on 13CrMo4-5 steel had 70 μm thickness while the scale of the clad had less than 10 μm. The microstructure, chemical composition of the obtained clad and scales were investigated by scanning electron microscope (SEM) and electron probe microanalyzer (EPMA) equipped with the EDS detectors.

Keywords: Laser cladding, Inconel 686, high - temperature corrosion, aggressive environment, oxide scale
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