CHEMICAL HETEROGENEITY OF INCONEL 625 LASER OVERLAY WITH AN INCREASED MOLYBDENUM CONTENT AND ITS EVALUATION USING THE POTENTIODYNAMIC CORROSION TEST

1 KLUFOVÁ Pavla
Co-authors:
2 VOSTŘÁK Marek 3 KŘÍŽ Antonín
Institutions:
1 Department of Material Science and Technology, Faculty of Mechanical Engineering, University of West Bohemia, Czech Republic, EU, klufovap@fst.zcu.cz
2 New Technologies – Research Centre, University of West Bohemia, Czech Republic, EU, mvostrak@ntc.zcu.cz
3 Department of Material Science and Technology, Faculty of Mechanical Engineering, University of West Bohemia, Czech Republic, EU, kriz@kmm.zcu.cz
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
962-967
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
22 views / 16 downloads
Abstract

The paper focuses on a detailed analysis of chemical heterogeneity of Inconel 625 overlays with an increased molybdenum content deposited by laser cladding. Fifteen samples of laser overlays on S355J2 steel were prepared, each with an area of 90×140 mm. The thickness of the steel substrate was 50 mm. During the laser cladding process, the temperature field on the face of the substrate was monitored by means of a thermal imaging camera. The surfaces of the Inconel 625 overlays were then machined to their final thickness. Corrosion potential, polarization resistance and corrosion rate in selected areas of laser clads were determined by the potentiodynamic corrosion test. These data were correlated with the temperature profiles during laser cladding and with microstructures of the overlays.

Keywords: Laser cladding, Inconel 625, heterogeneity, potentiodynamic corrosion test
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