TY - JOUR A1 - Kiehl, Maximilian A1 - Scheid, Adriano A1 - Graf, Karin A1 - Ernst, Benedikt A1 - Tetzlaff, Ulrich T1 - Coaxial Laser Cladding of Cobalt-Base Alloy Stellite™ 6 on Grey Cast Iron Analysis of the Microstructural and Mechanical Properties Depending on the Laser Power JF - Journal of Materials Engineering and Performance N2 - A high-power diode laser was used to generate single- and multi-bead coatings of Stellite™ 6 by coaxial laser cladding over flat grey cast iron (EN-GJLP-200) as a preliminary study to develop a wear and corrosion resistant coating for brake disks on a cost-effective substrate. In this article, we have focused on a detailed quantitative analysis of the effect of different laser powers (1.5, 2.0, 2.5, 3.0, 3.5, and 4.0 kW) on the bead geometry, dilution, microstructure, and hardness. Coatings dilution or composition depends directly on the laser power as well as bead geometry. The typical microstructure of the coatings comprises a solid solution of α (hcp)- and β (fcc)-Co with a dendritic structure as a metal matrix and an interdendritic lamellar eutectic, which contains predominantly β-Co, chromium carbides Cr7C3 and Cr23C6 as well as blocky tungsten carbide W2C. Coating hardness depends on the chemical composition and microstructure that is modified by the deposition parameters. Low laser power results in high carbide fraction and most refined microstructures, accounting for harder coatings. UR - https://doi.org/10.1007/s11665-022-07358-3 KW - bead geometry KW - grey cast iron KW - hardness KW - laser power KW - microstructure KW - Stellite 6™ Y1 - 2022 UR - https://doi.org/10.1007/s11665-022-07358-3 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-31249 SN - 1544-1024 SN - 1059-9495 VL - 32 IS - 8 SP - 3821 EP - 3838 PB - Springer CY - New York ER - TY - JOUR A1 - Graf, Karin A1 - Tetzlaff, Ulrich A1 - Biscaia de Souza, Gelson A1 - Scheid, Adriano T1 - Effect of Dilution on the Microstructure and Properties of CoCrMoSi alloy Coatings Processed on High-Carbon Substrate JF - Materials Research: Revista Ibero-Americana de Materiais N2 - The Laves phase reinforced CoCrMoSi alloy system has emerged as a candidate material to protect the surface of components to withstand harsh environments under wear and/or corrosion. However, previous reports have raised some concerns and restricted a wider selection of iron-based substrates to be coated, especially limiting the carbon content. This work aims to outline the Laves - Carbides phases in the microstructure and its effect on the properties of T400 alloy deposited on GGG40 ductile iron. Dilution of 26 % ensured Laves formation either as primary or secondary, due to high-silicon substrate selected. Departing from 41 % dilution, the alloy changed to a completely carbide strengthened system. Therefore, for the lowest dilution the coatings hardness is dictated by Laves phase whereas, for higher ones, carbides are the most influent phases. UR - https://doi.org/10.1590/1980-5373-MR-2018-0502 KW - CoCrMoSi Alloy KW - Microstructure KW - Coatings KW - High-Carbon Substrate Y1 - 2018 UR - https://doi.org/10.1590/1980-5373-MR-2018-0502 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-9593 SN - 1980-5373 SN - 1516-1439 VL - 22 IS - 1 PB - Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) CY - São Carlos ER - TY - JOUR A1 - Kiehl, Maximilian A1 - Scheid, Adriano A1 - Graf, Karin A1 - Ernst, Benedikt A1 - Tetzlaff, Ulrich T1 - Coaxial laser cladding of cobalt-base alloy Stellite™ 6 on gray cast iron/investigations on friction, wear versus commercial brake pad, and corrosion characteristics JF - Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering UR - https://doi.org/10.1177/09544070221145512 Y1 - 2023 UR - https://doi.org/10.1177/09544070221145512 SN - 2041-2991 SN - 0954-4070 VL - 237 IS - 14 SP - 3285 EP - 3303 PB - Sage CY - London ER -