Characterization and wear behavior of TiBC coatings formed by thermo-reactive diffusion technique on AISI D6 steel

Autor: Lütfullah Özdoğan, Bülent Kurt, Ömer Bölükbaşi, Bekir Güney, Ali Günen
Přispěvatelé: Mühendislik ve Doğa Bilimleri Fakültesi -- Metalurji ve Malzeme Mühendisliği Bölümü, Bölükbaşı, Ömer Saltuk, Günen, Ali
Rok vydání: 2020
Předmět:
Wear resistance
Cracks
Surface roughness (Ra)
Scanning electron microscope
B-c coatings
02 engineering and technology
Energy dispersive spectroscopy
01 natural sciences
law.invention
Coating
Wear
law
Thermo-reactive deposition
Materials Chemistry
Surface roughness
Vanadium carbide
Diffusion coatings
Composite material
Abrasive wear
Microstructure
010302 applied physics
Physics
Abrasive
Temperature
Surfaces and Interfaces
Tribological performance
021001 nanoscience & nanotechnology
Condensed Matter Physics
Hardness
Surfaces
Coatings and Films
Wear of materials
Applied
0210 nano-technology
Scanning electron microscopy
Materials science
Friction
Materials Science
Mechanical-properties
Energy-dispersive X-ray spectroscopy
engineering.material
Titanium carbide
Sliding distances
Optical microscope
Magnetra Sputtering | Nanoindentation | Chromium Boride
Coatings
0103 physical sciences
Titanium alloys
Nano-indentation hardness
Elastic modulus
TiBC
General Chemistry
Micro-structural characterization
Reactive diffusion
Kinetics
Energy dispersive spectroscopies (EDS)
Microhardness
engineering
Micro-structural
Coatings & Films
Zdroj: Surface and Coatings Technology. 385:125332
ISSN: 0257-8972
0005-2698
DOI: 10.1016/j.surfcoat.2020.125332
Popis: WOS: 000526980900010
A two-step Thermo reactive diffusion processes (including an initial titatinizing step followed by boronizing) is proposed in order to obtain superhard complex TiBC coating layer on AISI D6 steel. Microstructural characterization and mechanical properties of obtained TiBC layer conducted by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), optical microscopy, 2D profilometer, X-ray diffraction (XRD), micro-hardness, nano-indentation hardness and ball-on disc wear tests. Wear tests were carried out in ball on disc device by applying 30 N load and 500 m sliding distance against WC abrasive ball. Microstructural studies revealed a compact, homogenous and crack-free TiBC layer with 0.29-1.91 surface roughness (Ra), 3.65-29.5 mu m thickness and 1800-4841 HV0.05, hardness and 146-235 GPa elastic modulus. Hardness values of TiBC layers was significantly higher than those obtained by standard titanizing and boronizing due to the interspersed TiB and TiC phases within the TiBC layer. Higher hardness values are highly effective on the wear resistance and wear type. Thus, in parallel with the increase in mechanical properties, wear resistance increased in the range of 4-120 times in comparison with the untreated AISI D6 sample. Severe wear and extensive plastic deformation was observed in the untreated AISI D6, while micro-cutting, micro-cracking and pitting was dominant in samples with hardness 1800-4000 HV. When the surface hardness reached values above 4000 HV the wear mechanism further changed to microcracking and spalling.
Databáze: OpenAIRE
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