Definition
Wear is the gradual removal or displacement of material from a surface caused by mechanical contact (sliding, rolling, or impact) between two surfaces in relative motion. It is a mechanical damage mechanism, distinguished from corrosion by its physical, contact-driven origin rather than a chemical reaction.
Key facts
- Caused by mechanical contact and relative motion between surfaces, distinct from corrosion's chemical origin.
- Common forms include abrasive wear (hard particles), adhesive wear (surface material transfer), and erosive wear (fluid or particle impact).
- Rate depends on lubrication condition, contamination, surface hardness, and load, which is why lubrication management directly influences wear rate.
- Detected through dimensional measurement, visual inspection, or oil analysis (wear-particle counts and composition) depending on the component.
What does Wear reveal about failures?
Wear is the progressive loss or displacement of surface material resulting from mechanical contact between two surfaces in relative motion (sliding, rolling, or repeated impact) gradually changing a component's dimensions, surface finish, or fit until it can no longer perform its function reliably.
How do teams use Wear in failure analysis?
Wear is recognized through dimensional measurement showing material loss or clearance increase beyond tolerance, visual signs such as scoring or surface roughening, or oil analysis detecting elevated wear-particle counts, and is distinguished from corrosion by the absence of a chemical reaction driving the material loss.
FAQ
Frequently asked questions
What does wear on a component refer to?
It refers to the gradual removal of material from a surface due to mechanical contact and relative motion (such as sliding or rolling against another surface) distinct from the chemical origin of corrosion.
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