The phrase combines galling, the engineering name for adhesive surface damage during sliding contact, with failure, meaning loss of intended function. In this use, galling is related to the older verb gall, meaning to chafe or rub sore, but the modern technical phrase belongs to materials engineering and tribology.
What does galling failure mean?
It means a failure mode where sliding metal surfaces adhere, transfer material, tear, and may seize or stop moving properly.
Is galling failure the same as adhesive wear?
It is a kind or result of adhesive wear. Adhesive wear is the broader mechanism, while galling failure emphasizes damaging surface transfer, tearing, and loss of function.
Where does galling failure happen?
It often happens in threaded fasteners, valves, bearings, hydraulic parts, sheet-metal forming tools, and other metal surfaces that slide under load.
What causes galling failure?
It is caused by friction and adhesion at small contact points, especially when load is high, lubrication is poor, surfaces are compatible, or the material is prone to sticking.
Is galling failure common in stainless steel?
Yes. Austenitic stainless steel fasteners and sliding stainless parts are known to be vulnerable, especially when similar metals rub together under pressure.
How can galling failure be prevented?
Common controls include lubrication, choosing less compatible material pairs, using harder or galling-resistant alloys, applying coatings, and controlling load and assembly speed.
Is galling failure just a scratch?
No. A scratch may be simple abrasion, but galling failure involves adhesion, material transfer, tearing, rough raised damage, or seizure.