|
TYPE |
DESCRIPTION |
|
Abrasive wear |
A cutting or scratching action caused when either hard
particles or hard projections wear away or cut into softer
surfaces. Wear involving two surfaces and a separate hard particle
between them is termed three-body abrasion. Wear involving
a hard surface projection, or a free particle, contacting an
opposing surface is termed two-body abrasion. |
|
Erosive wear |
A form of two-body abrasive wear specifically referring to the
impact damage and material removal associated with high-velocity
particles striking part surfaces. Erosion often is worst in
metering orifices or angled turns in high pressure systems. |
|
Adhesive wear |
Occurs when the oil film becomes so thin that the roughest
parts of the opposing moving part surfaces begin to touch each
other. Metal may be torn off the part surfaces or transferred from
one surface to the other and eventual seizure of the affected
parts is likely. |
|
Corrosive (chemical) wear |
Results when chemical reactions cause corrosion, oxidation and
pitting of part surfaces and/or when part movement or fluid
pressure dislodges material from this surface layer. |
|
Cavitation wear |
Occurs when metal is removed from part surfaces by the violent
impact of collapsing cavitation bubbles. |
|
Fatigue wear |
Occurs when cyclic or repeated load stresses cause cracking,
spalling and pitting of the component part surfaces. |
|
Fretting wear
|
Wear between two tightly fitting surfaces having a cyclic
relative oscillating motion of small amplitude. |
