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Effect of sensitization on tribological behavior of AISI 304 austenitic stainless steel

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      Abstract

      This paper aims to evaluate the dry sliding wear of AISI 304 austenitic stainless steel as a function of the applied load. Samples of AISI 304 were heat treated (sensitized) to precipitate Cr23C6 carbides in the grain boundaries, and the resulting microstructure was compared to that of the non-sensitized samples. Wear testing was carried out at room temperature of 25°C and a relative humidity of about 60% using a pin-on-disk apparatus. The load applied was varied from 10 to 30 N at a constant sliding velocity of 0.5 m s–1. Wear particles were analyzed by means of scanning electron microscopy and X-ray diffraction. The results showed that the dynamic friction coefficient remained effectively constant with increasing applied load. The surface hardness measured after the wear process generally increased at higher loads due to subsurface strain-hardening, and deformation-induced martensitic transformation occurred during the wear process. Surface roughness and weight losses were found to increase with increasing the load for both sensitized and non-sensitized samples. In addition, a great amount of Cr23C6 carbides in the grain boundaries favored a size reduction of the debris generated due to wear.

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      Most cited references 29

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      Stacking fault energies of seven commercial austenitic stainless steels

       R. Schramm,  R. Reed (1975)
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        Tribology: friction and wear of engineering materials

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          First-principles theory of atomic-scale friction.

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            Author and article information

            Affiliations
            a Materials Engineering, University of the Extreme South of Santa Catarina, Criciúma, SC, Brazil
            b Mechanical Engineering, UNISOCIESC, SOCIESC University Center, Joinville, SC, Brazil
            Author notes
            [*] Correspondence address, Prof. Adriano Michael Bernardin, Dr. Eng., Materials Engineering University of the Extreme South of Santa Catarina, Av. Universitaria 1105, 88.806-000, Criciúma, SC, Brazil, Tel.: (+55)4834443735, Fax: (+55)4834312750, E-mail: amb@123456unesc.net, Web: www.unesc.net
            Journal
            ijmr
            International Journal of Materials Research
            Carl Hanser Verlag
            1862-5282
            2195-8556
            13 March 2018
            : 109
            : 3
            : 234-240
            MK111594
            10.3139/146.111594
            © 2018, Carl Hanser Verlag, München
            Counts
            References: 34, Pages: 7
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