The Experts below are selected from a list of 2466 Experts worldwide ranked by ideXlab platform
M.-h. Zhu - One of the best experts on this subject based on the ideXlab platform.
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the effect of alumina particle on improving adhesion and Wear Damage of wheel rail under wet conditions
Wear, 2016Co-Authors: X Cao, Qing Yang Liu, C. G. He, Wen Jian Wang, W.-l. Huang, Jun Guo, Junqi Peng, M.-h. ZhuAbstract:Abstract The objective of this study was to explore the effect of alumina particle on improving adhesion and Wear Damage of wheel/rail under wet conditions using a rolling–sliding Wear apparatus. The results indicate that alumina particles significantly improve adhesion coefficient under wet conditions. The adhesion coefficient declines with the alumina particle size increasing from S (about 75 μm) to L (about 250 μm) and then keeps stable. Meanwhile, the adhesion coefficient increases firstly with the feed rate increasing from 1 to 3 g/min, and then decreases from 3 to 7 g/min, subsequently, keeps stable to 10 g/min. With an increase in particle size and feed rate, the Wear rates of wheel/rail rollers increase, the thickness of plastic deformation layers and surface hardness decrease, and the Damage mechanism turns from slight spalling to severe spalling and big pit. The embedded alumina particles on the roller surface produce high stress and change the plastic deformation line. Fatigue cracks develop from the surface and the wall of the pit on the rollers, and tend to connect with each other resulting in the removal of material. Furthermore, the interlayer material in the severe cracks tends to break.
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The effect of alumina particle on improving adhesion and Wear Damage of wheel/rail under wet conditions
Wear, 2016Co-Authors: X Cao, Qing Yang Liu, C. G. He, J. F. Peng, Wen Jian Wang, W.-l. Huang, Jun Guo, M.-h. ZhuAbstract:The objective of this study was to explore the effect of alumina particle on improving adhesion and Wear Damage of wheel/rail under wet conditions using a rolling-sliding Wear apparatus. The results indicate that alumina particles significantly improve adhesion coefficient under wet conditions. The adhesion coefficient declines with the alumina particle size increasing from S (about 75 μm) to L (about 250 μm) and then keeps stable. Meanwhile, the adhesion coefficient increases firstly with the feed rate increasing from 1 to 3 g/min, and then decreases from 3 to 7 g/min, subsequently, keeps stable to 10 g/min. With an increase in particle size and feed rate, the Wear rates of wheel/rail rollers increase, the thickness of plastic deformation layers and surface hardness decrease, and the Damage mechanism turns from slight spalling to severe spalling and big pit. The embedded alumina particles on the roller surface produce high stress and change the plastic deformation line. Fatigue cracks develop from the surface and the wall of the pit on the rollers, and tend to connect with each other resulting in the removal of material. Furthermore, the interlayer material in the severe cracks tends to break.
X Cao - One of the best experts on this subject based on the ideXlab platform.
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the effect of alumina particle on improving adhesion and Wear Damage of wheel rail under wet conditions
Wear, 2016Co-Authors: X Cao, Qing Yang Liu, C. G. He, Wen Jian Wang, W.-l. Huang, Jun Guo, Junqi Peng, M.-h. ZhuAbstract:Abstract The objective of this study was to explore the effect of alumina particle on improving adhesion and Wear Damage of wheel/rail under wet conditions using a rolling–sliding Wear apparatus. The results indicate that alumina particles significantly improve adhesion coefficient under wet conditions. The adhesion coefficient declines with the alumina particle size increasing from S (about 75 μm) to L (about 250 μm) and then keeps stable. Meanwhile, the adhesion coefficient increases firstly with the feed rate increasing from 1 to 3 g/min, and then decreases from 3 to 7 g/min, subsequently, keeps stable to 10 g/min. With an increase in particle size and feed rate, the Wear rates of wheel/rail rollers increase, the thickness of plastic deformation layers and surface hardness decrease, and the Damage mechanism turns from slight spalling to severe spalling and big pit. The embedded alumina particles on the roller surface produce high stress and change the plastic deformation line. Fatigue cracks develop from the surface and the wall of the pit on the rollers, and tend to connect with each other resulting in the removal of material. Furthermore, the interlayer material in the severe cracks tends to break.
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The effect of alumina particle on improving adhesion and Wear Damage of wheel/rail under wet conditions
Wear, 2016Co-Authors: X Cao, Qing Yang Liu, C. G. He, J. F. Peng, Wen Jian Wang, W.-l. Huang, Jun Guo, M.-h. ZhuAbstract:The objective of this study was to explore the effect of alumina particle on improving adhesion and Wear Damage of wheel/rail under wet conditions using a rolling-sliding Wear apparatus. The results indicate that alumina particles significantly improve adhesion coefficient under wet conditions. The adhesion coefficient declines with the alumina particle size increasing from S (about 75 μm) to L (about 250 μm) and then keeps stable. Meanwhile, the adhesion coefficient increases firstly with the feed rate increasing from 1 to 3 g/min, and then decreases from 3 to 7 g/min, subsequently, keeps stable to 10 g/min. With an increase in particle size and feed rate, the Wear rates of wheel/rail rollers increase, the thickness of plastic deformation layers and surface hardness decrease, and the Damage mechanism turns from slight spalling to severe spalling and big pit. The embedded alumina particles on the roller surface produce high stress and change the plastic deformation line. Fatigue cracks develop from the surface and the wall of the pit on the rollers, and tend to connect with each other resulting in the removal of material. Furthermore, the interlayer material in the severe cracks tends to break.
Paul A. Meehan - One of the best experts on this subject based on the ideXlab platform.
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real time rail wheel Wear Damage control
International Journal of Rail Transportation, 2016Co-Authors: Ye Tian, Willian J.t. Daniel, Paul A. MeehanAbstract:This paper presents the performance of a real-time rail--wheel Wear Damage control system with respect to different operation conditions. In particular, an investigation into the Wear growth rate control under changing wheel--rail friction conditions and different operation speeds is performed. Simulation using a mathematical model considering longitudinal--vertical--pitch dynamics of a locomotive running on straight tracks shows that the proposed controller can effectively reduce the rail--wheel Wear Damage by limiting mass loss rate, particularly during acceleration under low and medium speeds.
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Real-time rail–wheel Wear Damage control
International Journal of Rail Transportation, 2016Co-Authors: Ye Tian, Willian J.t. Daniel, Paul A. MeehanAbstract:© 2015 Informa UK Limited, trading as Taylor & Francis Group. ABSTRACT: This paper presents the performance of a real-time rail–wheel Wear Damage control system with respect to different operation conditions. In particular, an investigation into the Wear growth rate control under changing wheel–rail friction conditions and different operation speeds is performed. Simulation using a mathematical model considering longitudinal–vertical–pitch dynamics of a locomotive running on straight tracks shows that the proposed controller can effectively reduce the rail–wheel Wear Damage by limiting mass loss rate, particularly during acceleration under low and medium speeds.
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Real-time rail–wheel Wear Damage control
International Journal of Rail Transportation, 2015Co-Authors: Ye Tian, Willian J.t. Daniel, Paul A. MeehanAbstract:This paper presents the performance of a real-time rail--wheel Wear Damage control system with respect to different operation conditions. In particular, an investigation into the Wear growth rate control under changing wheel--rail friction conditions and different operation speeds is performed. Simulation using a mathematical model considering longitudinal--vertical--pitch dynamics of a locomotive running on straight tracks shows that the proposed controller can effectively reduce the rail--wheel Wear Damage by limiting mass loss rate, particularly during acceleration under low and medium speeds.
Y H Lu - One of the best experts on this subject based on the ideXlab platform.
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Wear Damage of alloy 690tt in partial and gross slip fretting regimes at high temperature
Wear, 2017Co-Authors: B B Yang, J Li, Y H Lu, Tetsuo ShojiAbstract:Abstract Wear Damage of Alloy 690TT in partial and gross slip fretting regimes at 320 °C was investigated. The obtained fretting regimes were controlled by modifying the displacement amplitude. In partial slip regime, adhesive Wear and fatigue crack were the main Wear mechanisms. The nanostructured tribological transformed structure (TTS) formed due to incomplete dynamic recrystallization (DRX) with existence of the carbide in TTS. In gross slip regime, oxidation and delamination dominated the fretting Wear behavior. The formation of glaze layer resulted in the reduction of Wear volume at 320 °C. The TTS with smaller grain size formed due to complete DRX. The oxide type of third body layer consisted of NiCr 2 O 4 , NiFe 2 O 4 and Fe 2 O 3 , irrespective of slip regime.
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evolution of Wear Damage in inconel 600 alloy due to fretting against type 304 stainless steel
Wear, 2016Co-Authors: J Li, Y H LuAbstract:Abstract Fretting Wear Damage is a concern in heat exchanger tube of Inconel 600 in nuclear power plants. Fretting Wear tests of Inconel 600 alloy against stainless steel type 304 were performed for the purpose to identify changes in the Wear mechanisms with number of cycles. The results indicated that as cycles increased, the Wear volume, worn scar depth and plastic regime at the scar edge first slowly increased, and then showed a significant increase. Correspondingly, the Wear mechanism transformed from local adhesive Damage to a combination of oxidation and delamination Wear. A tribologically transformed structure (TTS) layer formed after a minimum number of cycles had been reached. Fatigue cracks nucleated in the stick–slip zone, and propagated along a direction of 40–50° to the worn surface, then into TTS layer after it was formed. With further increases of cycle number, fatigue cracks destroyed the TTS layer, and that eventually led to a transition in the Wear mechanism.
Qing Yang Liu - One of the best experts on this subject based on the ideXlab platform.
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the effect of alumina particle on improving adhesion and Wear Damage of wheel rail under wet conditions
Wear, 2016Co-Authors: X Cao, Qing Yang Liu, C. G. He, Wen Jian Wang, W.-l. Huang, Jun Guo, Junqi Peng, M.-h. ZhuAbstract:Abstract The objective of this study was to explore the effect of alumina particle on improving adhesion and Wear Damage of wheel/rail under wet conditions using a rolling–sliding Wear apparatus. The results indicate that alumina particles significantly improve adhesion coefficient under wet conditions. The adhesion coefficient declines with the alumina particle size increasing from S (about 75 μm) to L (about 250 μm) and then keeps stable. Meanwhile, the adhesion coefficient increases firstly with the feed rate increasing from 1 to 3 g/min, and then decreases from 3 to 7 g/min, subsequently, keeps stable to 10 g/min. With an increase in particle size and feed rate, the Wear rates of wheel/rail rollers increase, the thickness of plastic deformation layers and surface hardness decrease, and the Damage mechanism turns from slight spalling to severe spalling and big pit. The embedded alumina particles on the roller surface produce high stress and change the plastic deformation line. Fatigue cracks develop from the surface and the wall of the pit on the rollers, and tend to connect with each other resulting in the removal of material. Furthermore, the interlayer material in the severe cracks tends to break.
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The effect of alumina particle on improving adhesion and Wear Damage of wheel/rail under wet conditions
Wear, 2016Co-Authors: X Cao, Qing Yang Liu, C. G. He, J. F. Peng, Wen Jian Wang, W.-l. Huang, Jun Guo, M.-h. ZhuAbstract:The objective of this study was to explore the effect of alumina particle on improving adhesion and Wear Damage of wheel/rail under wet conditions using a rolling-sliding Wear apparatus. The results indicate that alumina particles significantly improve adhesion coefficient under wet conditions. The adhesion coefficient declines with the alumina particle size increasing from S (about 75 μm) to L (about 250 μm) and then keeps stable. Meanwhile, the adhesion coefficient increases firstly with the feed rate increasing from 1 to 3 g/min, and then decreases from 3 to 7 g/min, subsequently, keeps stable to 10 g/min. With an increase in particle size and feed rate, the Wear rates of wheel/rail rollers increase, the thickness of plastic deformation layers and surface hardness decrease, and the Damage mechanism turns from slight spalling to severe spalling and big pit. The embedded alumina particles on the roller surface produce high stress and change the plastic deformation line. Fatigue cracks develop from the surface and the wall of the pit on the rollers, and tend to connect with each other resulting in the removal of material. Furthermore, the interlayer material in the severe cracks tends to break.
