Development of a test machine and method for galling studies

Ertaş, A.; Carper, H. J.; Blackstone, W. R.

doi:10.1007/bf02325587

Cited by 7 publications

(1 citation statement)

References 3 publications

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“…Meng et al [93] had performed numerous experiments and tried to validate the anti-friction, anti-wear and antigalling characteristics of NPAF coating, during which the NPAF coating material was prepared about 6 g of PTFE particles of diameter 591 nm and 15 g of Polyacrylic acid resin and then applied on manufactured buttress thread couplers and then tested for make-up torque as make-up torque is the function of the probability of galling in which higher the magnitude of make-up torque, the higher is the contingency of thread galling [30,91,[94][95][96][97][98][99]. After scrutinizing the data obtained by the after-experiment, they reported that there was a significant drop in the magnitude of make-up torque from 19,426 to 145,638 Nm i.e.…”

Section: Polytetrafluoroethylene (Ptfe)mentioning

confidence: 99%

A review: advancements in fluoro-based polymers for aggrandizing anti-galling and wear resistant characteristics

2019

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Galling is the surface phenomenon which involves adhesion of local contact points and creation of protrusions on the juxtaposition of surfaces owing to high friction, inappropriate tribological loading, starved lubrication and high contact pressure (~ 1000 kPa). All these factors result in severe plastic deformation varying from 8000 to 10,000 µε (ε-strain) and diffusion of materials into one another, which consequently results in fatigue wear, surface roughness, tribocorrosion and seizing up of critical parts. The aim of the review is to analyze and summarizes the issue of galling, concurrently it also deals with the novel and economical mitigation method i.e. use of fluorine based coatings e.g. PTFE, owing to their lowest friction coefficient from 0.02 to 0.2 among other solids, high stiffness, high thermal stability and non-adherent characteristics that augments the mechanical and tribological properties and concurrently protect against hostile environments that eventually upsurges the life of components.

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