The Examination of Microstructure and Thermal Oxidation Behavior of Laser-Remelted High-Velocity Oxygen Liquid Fuel Fe/Al Coating

Döleker K. M.

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, vol.29, no.5, pp.3220-3232, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 5
  • Publication Date: 2020
  • Doi Number: 10.1007/s11665-020-04873-z
  • Journal Name: JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Chemical Abstracts Core, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.3220-3232
  • Keywords: Fe, Al composite, FeAl, HVOLF, intermetallic, oxidation, remelting, HIGH-TEMPERATURE OXIDATION, 316 STAINLESS-STEEL, HEAT-TREATMENT, CORROSION BEHAVIOR, WEAR BEHAVIOR, PERFORMANCE, FABRICATION, POWDER, GROWTH, CREEP
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Aluminide intermetallics with superior mechanical and thermal properties can be produced using various techniques. Laser-remelted coating surfaces provide lower porosity and superior adhesion to the substrate. In the present study, Fe and Al powders were sprayed on the 316L stainless steel substrate using high-velocity oxygen liquid fuel (HVOLF) technique. The produced composite coating was subjected to laser heat treatment for the remelting of the coating layer. HVOLF Fe/Al coating, the remelted coating and the substrate were exposed to isothermal oxidation tests at 950 degrees C for 5, 25, 50 and 100 h. Before and after the oxidation tests, the samples were characterized using x-ray diffraction, scanning electron microscopy (SEM) and SEM elemental mapping analysis. Fe and Al were alloyed with the substrate via laser melting, and thus, an alumina-forming surface layer was obtained. Besides, the surface hardness of the substrate was increased by the remelting process. After the oxidation tests, the obtained results showed that the laser-remelted coating exhibits better oxidation performance compared to the substrate material and HVOLF Fe/Al coating with the effect of the formation of the protective alumina oxide layer.