Journal
MATERIALS LETTERS
Volume 62, Issue 15, Pages 2473-2475Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2007.12.025
Keywords
fatigue; fretting fatigue; adhesion; plasma nitriding; residual stress; friction force
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Fatigue tests with and without fretting against unnitrided fretting pads were conducted on unnitrided and plasma nitrided Ti-6Al-4V samples. Plasma nitrided samples exhibited higher surface hardness, higher surface compressive residual stress, lower surface roughness and reduced friction force compared with the unnitrided specimens. Plasma nitriding enhanced the lives of Ti-6Al-4V specimens under both plain fatigue and fretting fatigue loadings. This was explained in terms of the differences in surface hardness, surface residual stress, surface roughness and friction force between the unnitrided and nitrided samples. (C) 2007 Elsevier B.V. All rights reserved.
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