Tribological properties and wear mechanisms of DC pulse plasma nitrided austenitic stainless steel in dry reciprocating sliding tests

LUO, Quanshun, OLUWAFEMI, Oluwaseun, KITCHEN, Matthew and YANG, Shicai (2016). Tribological properties and wear mechanisms of DC pulse plasma nitrided austenitic stainless steel in dry reciprocating sliding tests. Wear, 376.

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Abstract

Expanded austenite (Gamma-N), or S-phase, is a special phase of low-temperature nitrided austenite containing highly super-saturated nitrogen in the form of heterogeneous Cr-N nano-clusters. A nitrided layer of singe phase N is known to provide austenitic stainless steel with combined high hardness, good wear resistance and superior corrosion resistance. This paper reports recent experiments on a comparative study of the sliding wear properties and wear mechanisms of nitrided austenite stainless steel AISI 316, with a special attention paid on worn surface structural evolutions induced by frictional heating and sliding deformation. The samples were prepared by DC pulsed plasma nitriding treatments of various time at a fixed power. Knoop micro-indentation has revealed hardening behaviour of the nitrided samples. The reciprocating ball-on-disc sliding wear and friction properties were investigated at ambient environment conditions using an alumina counterpart ball. The worn surfaces have been analysed by XRD,FEG-SEM and EDX to show wear induced changes in the crystalline characteristics and the wear mechanisms of tribo-oxidation, cracking, abrasive wear and ploughing deformation. Moreover, longitudinal cross-sectional foils of the worn samples have been prepared and analysed using TEM, to investigate the wear induced structural changes, including tribofilm formation, plastic deformation and delamination in depths of nano-scale.

Item Type:	Article
Additional Information:	Special issue for the Proceedings of 21st International Conference on Wear of Materials (Wear 2017). Paper first presented at International Conference on Wear of Materials Long Beach, California, USA, 26-30 March 2017
Uncontrolled Keywords:	Expanded austenite; DC pulsed plasma nitriding; Ball-on-disc sliding wear; Wear mechanisms; Cross-sectional TEM; Quantitative X-ray diffraction
Research Institute, Centre or Group - Does NOT include content added after October 2018:	Materials and Engineering Research Institute > Materials Analysis and Research Services
Identification Number:	https://doi.org/10.1016/j.wear.2016.12.022
Depositing User:	Quanshun Luo
Date Deposited:	19 Dec 2016 16:06
Last Modified:	18 Mar 2021 00:54
URI:	https://shura.shu.ac.uk/id/eprint/14255

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