Adhesive Wear
How is adhesive wear volume quantified mathematically?
Governed by Archard’s Law: V = (KWL)/(3H), where V is wear volume, K is the wear coefficient, W is normal load, L is sliding distance, and H is the hardness of the softer material.
What distinguishes 'mild' from 'severe' adhesive wear?
Classified by wear rate and debris size; mild wear produces fine particles with low volume loss, while severe wear generates large debris and rapid surface destruction.
What is the primary driver for adhesive wear initiation in CMMS failure logs?
Lubrication breakdown (insufficient film, contamination, or wrong viscosity) leading to direct asperity contact and micro-welding.
Adhesive wear is a wear mechanism caused by the transference of material from one surface to another during relative sliding motion, resulting from solid-phase welding (cold welding) of microscopic surface asperities when atomic bonding forces between contacting surfaces exceed the inherent strength of the materials.
In manufacturing and asset reliability, adhesive wear is managed by ensuring sufficient lubrication film thickness to prevent metal-to-metal contact, selecting compatible material pairs (e.g., dissimilar hardness), and monitoring surface roughness and load conditions to avoid micro-weld formation at sliding interfaces like piston-cylinders or gear teeth. This mechanism accounts for approximately 70% of typical metal sliding component failures, making it a critical metric in reliability engineering.
Seizure (Jamming): Occurs when wear debris particles exceed system clearances, causing complete locking of sliding components due to excessive adhesion.
Scuffing/Scoring: Severe surface damage characterized by rough, torn patches and material transfer, often triggered by lubricant failure under high load or temperature.
Galling: Extreme plastic flow and material transfer resulting from overloading or incorrect lubricant selection, leading to rapid surface degradation.