Search Results - "Fenske, G.R."

Effect of exhaust gas recirculation (EGR) contamination of diesel engine oil on wear by Aldajah, S., Ajayi, O.O., Fenske, G.R., Goldblatt, I.L.

“…Exhaust gas recirculation (EGR) is one of the effective means to reduce the NO X emission from diesel engines. Returning exhaust product to the diesel engine…”
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Analytical predictive modeling of scuffing initiation in metallic materials in sliding contact by Ajayi, O.O., Lorenzo-Martin, C., Erck, R.A., Fenske, G.R.

“…Scuffing, described as sudden catastrophic tribological failure of a sliding surface, is a complex phenomenon and consequently still poorly understood. Its…”
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Scuffing mechanism of near-surface material during lubricated severe sliding contact by Ajayi, O.O., Lorenzo-Martin, C., Erck, R.A., Fenske, G.R.

“…Scuffing, defined as a sudden catastrophic failure of lubricated sliding contact, is one of the least understood tribological failure processes, in spite of…”
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Synthesis of superlow-friction carbon films from highly hydrogenated methane plasmas by Erdemir, A., Eryilmaz, O.L., Nilufer, I.B., Fenske, G.R.

“…In this study, we investigated the friction and wear performance of diamond-like carbon films (DLC) derived from increasingly hydrogenated methane plasmas. The…”
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Frictional anisotropy under boundary lubrication: Effect of surface texture by Ajayi, O.O., Erck, R.A., Lorenzo-Martin, C., Fenske, G.R.

“…The friction coefficient was measured under boundary lubrication with a ball-on-flat contact configuration in unidirectional sliding. The ball was smooth and…”
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Effect of source gas chemistry on tribological performance of diamond-like carbon films by Erdemir, A., Eryilmaz, O.L., Nilufer, I.B., Fenske, G.R.

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Characterization of transfer layers forming on surfaces sliding against diamond-like carbon by Erdemir, A., Bindal, C., Fenske, G.R., Zuiker, C., Wilbur, P.

“…Metallic and ceramic surfaces may become covered with a carbon-rich transfer layer during sliding against diamond-like carbon (DLC) films. The presence of such…”
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Friction and wear performance of diamond-like carbon films grown in various source gas plasmas by Erdemir, A., Nilufer, I.B., Eryilmaz, O.L., Beschliesser, M., Fenske, G.R.

“…In this study, we investigated the effects of various source gases (methane, ethane, ethylene, and acetylene) on the friction and wear performance of…”
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Tribological characteristics of DLC films and duplex plasma nitriding/DLC coating treatments by Meletis, E.I., Erdemir, A., Fenske, G.R.

“…An innovative approach to improving tribological behavior of surfaces and meeting long-term durability requirements of engineering devices is to design and…”
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Effect of source gas and deposition method on friction and wear performance of diamondlike carbon films by Erdemir, A., Fenske, G.R., Terry, J., Wilbur, P.

“…We investigated the tribological performance of diamondlike carbon (DLC) films derived from methane, acetylene, and hydrogen + methane source gases in a…”
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Formation of austenite during scuffing failure of SAE 4340 steel by Hershberger, J, Ajayi, O.O, Zhang, J, Yoon, H, Fenske, G.R

“…Scuffing failure was induced in samples of SAE 4340 steel which had been quenched and annealed at several temperatures. Examination of worn areas using…”
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Durability and tribological performance of smooth diamond films produced by Ar-C60 microwave plasmas and by laser polishing by ERDEMIR, A, HALTER, M, FENSKE, G. R, KRAUSS, A, GRUEN, D. M, PIMENOV, S. M, KONOV, V. I

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Friction and wear behavior of near-frictionless carbon coatings in formulated gasolines by Hershberger, J., Woodford, J.B., Erdemir, A., Fenske, G.R.

“…Million-cycle reciprocating wear tests have been carried out to determine the ultimate wear lifetime of near-frictionless carbon (NFC) coatings applied to…”
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Friction and wear properties of smooth diamond films grown in fullerene + argon plasmas by Erdemir, A., Bindal, C., Fenske, G.R., Zuiker, C., Krauss, A.R., Gruen, D.M.

“…In this study, we describe the nanocrystalline structure and ultralow friction and wear properties of smooth (20–50 nm root mean square (RMS)) diamond films…”
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Effect of microstructure and thickness on the friction and wear behavior of CrN coatings by Lorenzo-Martin, C., Ajayi, O., Erdemir, A., Fenske, G.R., Wei, R.

“…One of the most commonly used tribological thin-film coatings is chromium nitride (CrN), typically deposited by physical vapor deposition. Examples of current…”
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Effect of friction stir processing on the tribological performance of high carbon steel by Aldajah, S.H., Ajayi, O.O., Fenske, G.R., David, S.

“…Friction stir processing (FSP) was applied to 1080 carbon steel as a means to enhance the near-surface material properties. The process transformed the…”
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Tribological properties of nanocrystalline diamond films by Erdemir, A., Fenske, G.R., Krauss, A.R., Gruen, D.M., McCauley, T., Csencsits, R.T.

“…In this paper, we present the friction and wear properties of nanocrystalline diamond (NCD) films grown in Ar–fullerene (C 60) and Ar–CH 4 microwave plasmas…”
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Evidence of scuffing initiation by adiabatic shear instability by Hershberger, J., Ajayi, O.O., Zhang, J., Yoon, H., Fenske, G.R.

“…A mechanism for the initiation of scuffing based on adiabatic shear instability was assessed experimentally through the measurement of dislocation densities by…”
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Formation of ultralow friction surface films on boron carbide by Erdemir, A., Bindal, C., Fenske, G. R.

“…In this letter, we describe the formation and ultralow friction mechanisms of a surface film on boron carbide (B4C). This film results from sequential…”
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Microstructural evolution during scuffing of hardened 4340 steel—implication for scuffing mechanism by Ajayi, O.O., Hersberger, J.G., Zhang, J., Yoon, H., Fenske, G.R.

“…Microstructural changes occurring during scuffing failure in hardened 4340 steel were studied with a block-on-ring test rig using a step-loading test protocol…”
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