Journal of Materials Science

, Volume 43, Issue 14, pp 4929–4937 | Cite as

Influence of austenitising temperature on the formation of strain induced martensite in austempered ductile iron

  • Srinivasmurthy Daber
  • K. S. Ravishankar
  • P. Prasad RaoEmail author


The present work was taken up to study the influence of austenitising temperature on the formation of strain-induced martensite in austempered ductile iron. Ductile iron containing 1.5 wt.% nickel, 0.3 wt.% molybdenum and 0.5 wt.% copper was subjected to austempering treatments which consisted of three austenitising temperatures, namely 850, 900 and 950 °C, and three austempering temperatures, namely 300, 350 and 400 °C. Tensile tests were carried out under all the heat-treatment conditions and strain-hardening behaviour was studied by applying Hollomon equation. Microstructures were studied by optical microscopy and X-ray diffraction. It was found that increasing austenitising temperature increased the tendency for the formation of strain-induced martensite at all the austempering temperatures.


Ferrite Austenite Martensite Ductile Iron Austempering 



This work was financially supported by the Council of Scientific and Industrial Research, New Delhi, India.


  1. 1.
    Johansson M (1977) AFS Trans 85:117Google Scholar
  2. 2.
    Gundalach RB, Janowak JF (1983) AFS Trans 91:377Google Scholar
  3. 3.
    Rouns TN, Rundman KB, Moore DM (1984) AFS Trans 92:815Google Scholar
  4. 4.
    Gundalach RB, Janowak JF (1986) In: Proceedings of the 2nd international conference on ‘Austempered ductile iron’, ASME Gear Research Institute, Ann Arbor, MI, USA, March 1986, p 23Google Scholar
  5. 5.
    Arnzabal J, Gutiererez I, Rodriguez-Ibabe JM, Urcola JJ (1992) Mater Sci Technol 8:263CrossRefGoogle Scholar
  6. 6.
    Timokhina IB, Hodgson PD, Pereloma EV (2004) Metal Mater Trans A 35A:2331. doi: CrossRefGoogle Scholar
  7. 7.
    Daber S, Prasad Rao P (2008) J Mater Sci 43:357CrossRefGoogle Scholar
  8. 8.
    Cullity BD (1974) Elements of X-ray diffraction. Addison-Wesley, Reading, p. 411Google Scholar
  9. 9.
    Roberts CS (1953) Trans AIME 197:203Google Scholar
  10. 10.
    Astm E8 (1993) AnnualBook of ASTM Standards, 3.01 ASTM, p 542Google Scholar
  11. 11.
    Harding RA (1986) J Cast Iron 2:65Google Scholar
  12. 12.
    Sidjanin C, Smallman RE (1992) Mater Sci Technol 8:1095CrossRefGoogle Scholar
  13. 13.
    Prasad Rao P, Putatunda Susil K (1998) Metal Mater Trans A 29A:3005Google Scholar
  14. 14.
    Rundman KB, Klug RC (1982) AFS Trans 90:499Google Scholar
  15. 15.
    Voigt RC, Loper CR (1984) Proceedings of the 1st international conference on austempered ductile iron, ASM, Metals Park, OH, 1984, p 83Google Scholar
  16. 16.
    Hayrynen KL, Moore DJ, Rundman KB (1990) AFS Trans 98:471Google Scholar
  17. 17.
    Ali ASH, Uzlov KI, Darwish N, Elliot R (1994) Mater Sci Eng 10:35Google Scholar
  18. 18.
    Gundlach RB, Janowak JF (1985) Met Prog 128(2):19Google Scholar
  19. 19.
    Hollomon TH (1945) Trans AIME 162:268Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Srinivasmurthy Daber
    • 1
  • K. S. Ravishankar
    • 1
  • P. Prasad Rao
    • 1
    Email author
  1. 1.Department of Metallurgical and Materials EngineeringNational Institute of Technology KarnatakaSurathkal, MangaloreIndia

Personalised recommendations