Tool life data for different categories of hard PVD coating under varying (severing) operating conditions during dry high performance machining (ball-nose end milling) of hardened tool steel: (a) RSW vs cutting speed and (b) tool life of TiAlCrSiYN coating under extreme cutting conditions (cutting speed of 600 m/min) in comparison with TiAlCrN coating under conventional cutting conditions (cutting speed of 300 m/min).
High resolution TEM image (cross-sectional view) of ball-nose end mill with TiAlCrSiYN coating: (a) as-deposited condition and (b) after service (worn area).
Micromechanical properties of TiAlCrN and TiAlCrSiYN coatings measured at room and elevated temperatures: (a) microhardness, (b) elastic modulus, (c) strain to failure ratio, and (d) microhardness dissipation parameter (plasticity index).
TEM image (cross-sectional view) of the worn ball-nose area with TiAlCrSiYN coating with electron diffraction patterns and EDX spectra: region 1—buildup of workpiece material (steel H13), region 2—tool/buildup interface with the tribo-oxide formed during friction, and region 3—coating.
Photoelectron spectra of worn surface of TiAlCrSiYN coating: (a) , (b) , (c) , and (d) .
Fourier transformants of EELFS spectra from various microareas on the surface of worn crater: (a) nearest atomic surrounding that has the characteristics of a sapphire atomic structure and (b) nearest atomic surrounding has characteristics of a mullite atomic structure; the standard data of interatomic bond lengths in sapphire and mullite are presented at the top and the bottom correspondingly.
Schematic diagram of complex adaptive behavior of the hard coatings under intensifying external conditions.
Cutting data for testing of the TiAlCrN-based PVD coatings under conditions of high performance machining of hard-to-cut material.
Microstructure characteristics and properties of TiAlCrN-based coatings.
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