Advances in Tribology / 2012 / Article / Tab 4

Research Article

Mechanical and Tribological Properties of PVD-Coated Cemented Carbide as Evaluated by a New Multipass Scratch-Testing Method

Table 4

Schematic illustrations summarizing the observed coating damage mechanisms during the circular multi-pass scratch testing.

305209.tab.004Region A ( , loads below the fatigue limit)
Coating damage restricted to mild plastic deformation, minor cracking and wear caused by chipping or delamination.
Coating properties of utmost importance.
Region B1 ( )
Chipping and interfacial spalling at a high number of cycles ( ) controlled by high cycle fatigue.
Coating/interface properties of utmost importance.
Region B2 ( )
Chipping and interfacial spalling at a high number of cycles ( ) controlled by high cycle fatigue.
Coating/interface properties of utmost importance.
Region C (
Chipping and interfacial spalling at a relatively low number of cycles ( ) controlled by low cycle fatigue.
Interface properties of utmost importance.
Region D ( )
Chipping and interfacial spalling due to elastic recovery caused by pronounced plastic deformation of the cemented carbide substrate.
Interface/substrate material properties of utmost importance.

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