Fretting Wear Behavior of Cu–Al Coating on Ti-6Al-4V Substrate under Dry and Wet (Lubricated) Contact Condition |
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Authors: | Hyukjae Lee Shankar Mall Karl N Murray |
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Affiliation: | (1) School of Advanced Materials Engineering, Andong National University, Andong, Gyungbuk, 760-749, South Korea;(2) Department of Aeronautics and Astronautics, Air Force Institute of Technology, AFIT/ENY, 2950 Hobson way, Wright-Patterson AFB, Dayton, OH 45433-7765, USA |
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Abstract: | The fretting wear behavior of Cu–Al coating was investigated with and without fatigue load under the dry and wet (lubricated)
contact conditions. The Cu–Al coating was plasma deposited on titanium alloy, Ti-6Al-4V. Fretting regime was determined from
the shape of fretting hysteresis loop. Fretting regime changed from partial slip to total (gross) slip at ∼15 μm of the applied
relative displacement, and this transition point was independent of fatigue loading and contact surface (lubricated versus
dry) conditions. Wet contact condition reduced frictional force during cycling, as evidenced by the lower-tangential force.
Wear analysis using the accumulated dissipated energy approach did not show any effect of contact surface condition. In other
words, the relationship between the accumulated dissipated energy and wear volume showed a linear relationship, and it was
independent of loading and contact surface conditions, as well as of the fretting regime. Further, the relationship between
the wear depth and accumulated dissipated energy did not show any effect of loading and contact surface conditions, as well
as of the fretting regime up to instant when the maximum wear depth was equal to the coating thickness.
The views expressed in this article are those of the authors and do not reflect the official policy or position of the United
State Air Force, Department of Defense, or the U.S. Government. |
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Keywords: | Coating Cu– Al Wear Fretting Dissipated energy Relative displacement |
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