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Title: Effect of Cr and Zr addition on oxidation resistance of nanocrystalline Fe-Cr-Ni-Zr
Authors: Venkataraman, MB
Singh, R
Atanacio, AJ
Fu, J
Koch, C
Keywords: Metallurgical effects
Iron alloys
Mass spectroscopy
Grain boundaries
Grain size
Issue Date: 20-Nov-2011
Publisher: Curran Associates, Inc.
Citation: Venkataraman, M. B., Singh, R., Atanacio, A., Fu, J., & Koch, C. (2011). Effect of Cr and Zr addition on oxidation resistance of nanocrystalline Fe-Cr-Ni-Zr. In: Holloway, L. (ed), Proceedings of the 18th International Corrosion Congress 2011, Volume 2, Australasian Corrosion Association, Perth, Western Australia, 20-24 November (pp. 895-902). Retrieved from:
Abstract: The effect of nanocrystalline grain size and alloying additions of Cr, Ni and Zr on the oxidation resistance of nanocrystalline Fe-based alloys has been investigated. Bulk nanocrystalline alloy pellets, having composition Fe-xCr-5Ni-2Zr and Fe-xCr-5Ni {x = 7, 10} were prepared by a mechanical alloying and compaction route. A novel multi-step hot-compaction process has been investigated for the consolidation of powders into close-to-100% dense nc pellets (grain size 60-70 nm). The pellets showed high hardness (7.5-8.0 GPa) and reasonable ductility under shear stress condition. The high temperature oxidation resistance of these alloys, at 550 °C, has been compared with conventional microcrystalline stainless steel alloy. Nanocrystalline grain size was found to improve the oxidation resistance particularly in the alloys with lower Cr content. This behaviour is attributed to the greater grain boundary diffusivity of Cr in the nanocrystalline alloys. Zr addition was found to improve the thermal stability and insignificantly influence the oxidation resistance. © 2011 Australasian Corrosion Association
Description: Not available online.
ISBN: 9781618393630
Appears in Collections:Conference Publications

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