| Wear | Loss of material from a plate surface subjected to mechanical effects. |
| Surface Damage | Surface damage arises through mechanical contact between abrasive material and the plate. The surface damages emerge as micro-cracking, plastic deformation or micro-cutting. |
| Abrasion | Surface damage that arises when an abrasive body’s sharp edge penetrates a plate surface. |
| Wear Situation | Wear situation describes the abrasive material’s movement relative to the plate. Sliding, impact and squeezing wear are the wear situations that give rise to abrasion. |
| Abrasive Material | Materials that cause wear. The material can be either a body or a particle. A body does not have a defined size but a particle’s size is identified as sand or dust like. |
| Hardness | A solid material’s ability to withstand penetration or abrasion from other bodies. |
| Relative Hardness | The hardness relation between the abrasive material and the plate. |
| Cutting | Surface damage caused by abrasive material cutting chips out of the plate surface. |
| Plastic Deformation | Surface damage caused by abrasive material ploughing or penetrating the plate to which the material permanently deforms. Repeated plastic deformation leads to fatigue and wear of the surface. |
| Sliding Wear | Wear caused by abrasive bodies sliding over a plate. |
| Abrasive Impact | When abrasive bodies impact a plate surface at an angle of incidence. The surface damages are weakly dependent on the abrasive body’s hardness and result mainly in plastic deformation. |
| Particle Erosion | An abrasive particle impacting a plate surface at an angle of incidence. The surface damage is strongly dependent of the abrasive particle’s hardness and gives indentation marks and lip formation or plastic deformation. |
| Angle of Incidence | Angle of incidence is the angle between the abrasive body’s direction of motion and the plate surface. The angle of incidence strongly influences the erosive wear. Squeezing wear Occurs when the abrasive material is squeezed by an applied load between two surfaces. |
| Mohs Hardness | A method to rank materials with different hardnesses. The method is applied by scratching different materials against each other. The softer material will get scratched by the harder material. As an example, diamond is the hardest material and has Mohs number 10 while calcite is softer and has Mohs number 3. |