The effect of temperature on gross slip fretting wear of cold-sprayed nickel coatings on Ti6Al4V interfaces |
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Authors: | CH Hager Jr J Sanders A Voevodin |
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Affiliation: | a Universal Technology Corporation, 1270 North Fairfield Road, Dayton, OH 45432-2600, USA b AFRL/MLBT, Wright Patterson Air Force Base, 2941 Hobson Way, OH 45433-7750, USA c Department of Engineering Science and Mechanics, The Pennsylvania State University, 212 EES Building, University Park, PA 16802, USA |
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Abstract: | Fretting wear is an accumulation of damage that occurs at component interfaces that are subjected to high contact stresses coupled with low-amplitude oscillation. In metallic contacts, surface oxides, adhesion, and material transfer play a primary role in the initial stages of fretting wear degradation. Given these behaviors, the focus of this study was to determine the effect of temperature on inter-metallic fretting wear between Ti6Al4V (titanium, 6% aluminum, 4% vanadium) and cold-sprayed, commercially pure nickel coatings. The results presented herein show that increased temperature decreases friction through the formation of a uniform NiO layer, and by a reduction of Ni2O3 in contacts. In addition, it was found that a localized minimum friction coefficient is achieved at approximately 300 °C, above which friction increases slightly due to annealing of the cold-sprayed coatings. |
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Keywords: | Fretting wear Ti6Al4V Gross slip Nickel Nickel oxide High temperature |
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