Micro structure and wear analysis of multi-layer nitride coating deposited on the austenitic steel

Jasper, S.; Vijayakumar, D.; Ravichandran, M.; Sankarlal, R.L.; Subash, R.

doi:10.1016/j.matpr.2023.05.298

Cited by 1 publication

(1 citation statement)

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“…After the running-in stage, the friction coefficient tends to stabilize due to the formation of oxide film on the worn surfaces. The infrequent oscillation in the friction coefficient can be attributed to the compaction and delamination of wear debris which is called "oxidation-scrape-reoxidation" theory [30,31]. For the nitrided samples, the friction coefficient was rapidly stabilized after a short running-in stage due to their high hardness to hold thick oxide film [30].…”

Section: Wear Resistance Of Critical Temperature Nitrided Layersmentioning

confidence: 99%

High-Efficient Gas Nitridation of AISI 316L Austenitic Stainless Steel by a Novel Critical Temperature Nitriding Process

Tang,

Zhang,

Zhan

et al. 2023

Coatings

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To improve the surface properties of austenitic stainless steels, a thick S-phase layer was prepared by using a novel critical temperature nitriding (CTN) process. The properties of the thick S-phase layer were optimized by controlling the process parameters. The microstructures and phase compositions of CTN-treated layers were characterized by the optical microscope, scanning electron microscope and X-ray diffraction, respectively. The surface properties, including corrosion and wear resistance, were systematically investigated by the electrochemical workstation, micro-hardness tester and ball-on-disk tribometer, respectively. The results showed that a thick S-phase layer with a thickness of 18 to 25 μm can be fabricated in a short time by critical temperature nitriding, which represented higher efficiency than conventional low-temperature nitriding. Although the most top surfaces of CTN-treated layers contain massive iron nitrides, there are no precipitates in the inner nitrided layer. The electronic work function calculated by first-principles method has confirmed that those iron nitrides had a slight influence on the corrosion resistance of nitrided layers. The optimized CTN-treated layer exhibited a comparable corrosion resistance and wear resistance as the low-temperature nitrided layer. The CTN process is considered a potentially highly efficient surface modification method for austenitic stainless steels.

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Section: Wear Resistance Of Critical Temperature Nitrided Layersmentioning

confidence: 99%