Investigation of jatropha seed oil as austempering quenchant for ductile cast iron

  • Authors

    • Akor Terngu Mechanical Engineering Department Nigerian Defence Academy Kaduna
    • Gundu David Terfa University of Agriculture, Makurdi
    2014-08-26
    https://doi.org/10.14419/ijet.v3i3.1391
  • Austempering is a multi-step process that includes austenitizing, followed by cooling rapidly enough to avoid the formation of pearlite to a temperature above the martensite start (Ms) and then holding until the desired microstructure is formed. It is an isothermal heat treatment process that, when applied to cast iron, produces components that, in many cases, have properties superior to those process by conventional heat treatment. Salt bath has been recognized as the conventional quenching medium for austempering. This study investigates the suitability of jatropha seed oil as quenching medium for asaustempering ductile cast iron. Test samples were austenitized at 9500C; socked for 1hr; austempered for varying periods of 1, 2, 3, 4 and 5hrs. The result showed significant increase in tensile strength and impact energy apart from achieving an appreciable increase in hardness. It also tally with recommended values of ductile cast iron austempered in salt bath, implying that jatropha oil can be used as hot bath for the austempering of ductile cast iron.

    Keywords: Ausferrite, Austempering, Austenitized, Matrix So, Cked.

  • References

    1. T.N. Rouns, and K.B. Rundman, "Constitution of Austempered Ductile Iron and Kinetics ofAustempering", AFS Transactions, V. 95, pp. 851 – 874. 1987.
    2. U. Batra, S. Ray, S.R. Prabhakar, The influence of Nickel and Copper on the Austempering of Ductile iron. Journal of materials Engineering and Performance. Volume 13(1) Feb., PP. 64-68 2004.
    3. J. R Keough, "The Development, Processing and Application of Austempered Ductile Iron"; Proceedings of 1991 World Conference on ADI, Bloomingdale, IL, March, Pp. 12-14, 1991.
    4. R. Prasad Putatunda, and Susil KInvestigations on the fracture toughness of austempered ductile irons austenitized at different temperatures, Materials Science and Engineering. A349 PP.136 – 149, 2003.
    5. S. Seshan, "Austempered Ductile Iron – The under exploited wonder cast iron" Indian foundry journal October, PP. 84 – 92, 1998.
    6. K.L. Hayrynen, ADI Another avenue for ductile iron foundries, Modern Casting, 8 PP.35-38,1995
    7. Olivera Eri, An austempering study of ductile iron alloyed with copper. J. Serb Chem. Soc. 70 (7) PP.1015–1022. 2005.
    8. G. E. Totten, H.M. Tensi and K. Lanier. "Performance of vegetable oils as a cooling medium in comparison to a standard mineral oil".Mat. Eng. and Perf, Vol. 8, No, 4, p. 409-416, 999.
    9. Ester Carvalho de Souza, and George E. Totten, "Quenchants Derived from Vegetable Oils as Alternatives to Petroleum Oil" Department of Materials, Aeronautical and Automobile Engineering, School of Engineering, São Carlos, SP, Brazil 2011.
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  • How to Cite

    Terngu, A., & Terfa, G. D. (2014). Investigation of jatropha seed oil as austempering quenchant for ductile cast iron. International Journal of Engineering & Technology, 3(3), 387-390. https://doi.org/10.14419/ijet.v3i3.1391