A Comprehensive Study of Al0.6Ti0.4N Coatings Deposited by Cathodic Arc and HiPIMS PVD Methods in Relation to Their Cutting Performance during the Machining of an Inconel 718 Alloy
Autor: | Kenji Yamamoto, Myriam H. Aguirre, Igor Zhitomirsky, Qinfu Zhao, Luca W. Reolon, Stephen C. Veldhuis, German S. Fox-Rabinovich |
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Přispěvatelé: | Natural Sciences and Engineering Research Council of Canada |
Rok vydání: | 2021 |
Předmět: |
porosity
Materials science 02 engineering and technology engineering.material 01 natural sciences Thermal barrier coating Coating Residual stress 0103 physical sciences Cathodic arc deposition Materials Chemistry structure Composite material Inconel cutting tool life 010302 applied physics Micro-mechanical characteristics PVD coatings Structure Surfaces and Interfaces Engineering (General). Civil engineering (General) 021001 nanoscience & nanotechnology Surfaces Coatings and Films Cutting tool life Physical vapor deposition engineering TA1-2040 High-power impulse magnetron sputtering 0210 nano-technology Porosity micro-mechanical characteristics Layer (electronics) |
Zdroj: | Coatings, Vol 11, Iss 723, p 723 (2021) Digital.CSIC. Repositorio Institucional del CSIC instname Coatings Volume 11 Issue 6 |
ISSN: | 2079-6412 |
Popis: | This article belongs to the Special Issue Micro- and Nano- Mechanical Testing of Coatings and Surfaces. The structural, physical–chemical, and micromechanical characteristics of Al0.6Ti0.4N coatings deposited by different physical vapor deposition (PVD) methods, such as cathodic arc deposition (CAD), as well as advanced HiPIMS techniques were investigated in terms of their cutting performance during the machining of an Inconel 718 alloy. XRD studies had revealed that the HiPIMS coating featured lower residual stresses and more fine-grained structure. Electrochemical characterization with the potentiostat-impendence method shows that the HiPIMS coating has a significantly lower porosity than CAD. SEM and AFM studies of the surface morphology demonstrate that the HiPIMS coating has a smoother surface and an absence of droplet phases, in contrast with CAD. XRD, combined with FIB/TEM studies, shows a difference in the crystal structure of both coatings. The micromechanical characteristics of each coating, such as hardness, elastic modulus, fracture toughness, and adhesion to the substrate, were evaluated. The HiPIMS coating was found to possess a more beneficial combination of micromechanical properties compared to CAD. The beneficial characteristics of the HiPIMS coating alleviated the damage of the coated layer under operation. Combined with grain size refinement, this results in the improved adaptive performance of the HiPIMS coating through the formation of a greater amount of thermal barrier sapphire tribo-films on the friction surface. All of these characteristics contribute to the reduction of flank and crater wear intensity, as well as notching, leading to an improvement of the HiPIMS coating’s tool life. This research was funded by Natural Sciences and Engineering Research Council of Canada NSERC Grant NETGP 479639-15. |
Databáze: | OpenAIRE |
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