The Experts below are selected from a list of 663 Experts worldwide ranked by ideXlab platform
Dorothy W Coffey - One of the best experts on this subject based on the ideXlab platform.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
Ryan D. Evans - One of the best experts on this subject based on the ideXlab platform.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
Jane Y. Howe - One of the best experts on this subject based on the ideXlab platform.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
Harvey P. Nixon - One of the best experts on this subject based on the ideXlab platform.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
Craig V. Darragh - One of the best experts on this subject based on the ideXlab platform.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
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effects of Extreme Pressure Additive chemistry on rolling element bearing surface durability
Tribology International, 2007Co-Authors: Ryan D. Evans, Harvey P. Nixon, Jane Y. Howe, Craig V. Darragh, Dorothy W CoffeyAbstract:Abstract Lubricant Additives have been known to affect rolling element bearing surface durability for many years. Tapered roller bearings were used in fatigue testing of lubricants formulated with gear oil type Additive systems. These systems have sulfur- and phosphorus-containing compounds used for gear protection as well as bearing lubrication. Several variations of a commercially available base Additive formulation were tested having modified sulfur components. The variations represent a range of “active” Extreme Pressure (EP) chemistries. The bearing fatigue test results were compared with respect to EP formulation and test conditions. Inner ring near-surface material in selected test bearings was evaluated on two scales: the micrometer scale using optical metallography and the nanometer scale using transmission electron microscopy (TEM). Focused-ion beam (FIB) techniques were used for TEM specimen preparation. Imaging and chemical analysis of the bearing samples revealed near-surface material and tribofilm characteristics. These results are discussed with respect to the relative fatigue lives.
