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Publication Type : Journal Article
Publisher : Materials Research Express, Institute of Physics Publishing
Source : Materials Research Express, Institute of Physics Publishing, Volume 6, Number 8 (2019)
Keywords : AISI-304 stainless steel, Alloy steel, Austenitic stainless steel, Gas tungsten arc, Hardness, Hardness measurement, Intermetallic phasis, Intermetallics, Metallurgical microscope, Microstructure, nitrogen, Nitrogen environment, Particle size analysis, Surface modified layer, Tungsten, Wear of materials, Wear rates, Wear resistance
Campus : Coimbatore
School : School of Engineering
Department : Mechanical Engineering
Year : 2019
An examination was carried out on AISI304 Stainless steel with tungsten by surface modification using Gas Tungsten Arc as a heat source at a constant flow of nitrogen gas added to Argon shielding atmosphere. The microstructure of the W - modified area were observed using a metallurgical microscope. The composition of the surface modified layers were analyzed using EDS. The result of the EDS analysis confirmed the presence of W and N2 content in the modified layers. Further, the presence of intermetallic phases were found during the XRD analysis. Hardness measurements were carried out along the depth direction. The hardness increased by 2010HV on the W- modified layer under N2 atmosphere compared to the 277HV of the substrate. It is noticed that the wear resistance in the surface modified area improved to 0.8 × 10-4 mm3 / N-m from 10.94 × 10-4 mm3 / N-m of the substrate. The reduction in grain size, formation of intermetallic phases, and dispersion of W - particle in the modified layers has improved the hardness and the wear resistance. © 2019 IOP Publishing Ltd.
Cite this Research Publication : M. Krishnakumar and Saravanan R., “Impact of tungsten on microstructure, hardness and wear rate of AISI 304 stainless steel surface alloyed under nitrogen environment”, Materials Research Express, vol. 6, 2019.