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- Title
Tribological behaviour of plasma based low energy nitrogen ion implanted AISI 316 austenitic stainless steel against same stainless steel counterface.
- Authors
Lei, M. K.; Zhou, Q.; Ou, Y. X.; Song, T. K.; Guo, Y.
- Abstract
Tribological properties of a single high nitrogen face centred cubic phase γN layer formed on the plasma based low energy nitrogen ion implanted AISI 316 austenitic stainless steel were investigated on a ball on disc tribometer against the same stainless steel counterface under a normal load of 2 N with a sliding speed from 0·16 to 0·39 m s-1. The microhardness of the γN phase layer with a thickness of ∼13 μm and a nitrogen peak concentration of ∼35 at-% was measured to be ∼22 GPa. During the sliding for 1 h, the faint wear tracks of the γN phase layer against the same stainless steel ball were observed with all the sliding speeds. The friction coefficient of the γN phase layer changed in the range from 0·85 to 0·70 with increasing sliding speed. Formation of the γN phase layer on the stainless steel significantly improved the wear resistance of the stainless steel against the same stainless steel. An oxidative wear mechanism of the γN phase was found instead of an adhesive wear mechanism of the original stainless steel because the γN phase was prone to tribochemical oxidation on the worn surface due to the nitrogen supersaturation in austenite matrix.
- Subjects
AUSTENITIC stainless steel; TRIBOLOGY; ION implantation; FRETTING corrosion; MECHANICAL wear; PLASMA gases; NITROGEN content of steel; OXIDATION
- Publication
Surface Engineering, 2010, Vol 26, Issue 4, p277
- ISSN
0267-0844
- Publication type
Article
- DOI
10.1179/026708410X12671039164606