Tribological Properties of Ion-Implanted 52100 Steel |
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Authors: | T E Fischer M J Luton J M Williams C W White B R Appleton |
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Affiliation: | 1. Exxon Research and Engineering Company , Linden, New Jersey, 07036;2. Oak Ridge National Laboratory , Oak Ridge, Tennessee, 37830 |
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Abstract: | Titanium, argon, nitrogen, and iron were implanted in separate strips on a ferritic AISI E52100 cylinder. Three implant energies were chosen to obtain a continuous distribution from the surface to a depth of 120 nm and total doses were 4.1017 ions cm?2. The friction coefficient and wear track topography were measured by sliding against a martensitic AISI 52100 steel ball in air, in a fully formulated lubricant and in highly purified hexadecane. In dry sliding, titanium reduced the friction coefficient to 0.32 and suppressed the near-surface cracking, in agreement with previous work at Harwell and Naval Research Labs]. In hexadecane, titanium reduced the friction coefficient to 0.22, iron and nitrogen increased, it to 0.7 from 0.55, and all implants decreased wear. In the fully formulated lubricant, only the break-in pattern was modified. Auger measurements showed that carbon penetrated the material with all implants, creating TiC in the Ti-implanted strip and probably strengthening the other implanted areas by carbide precipitates and compressive stresses. |
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Keywords: | Nuclear Power Generation Reactor Coolant Pump Mechanical Seal TEHD Modeling |
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