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Intercritically Austenitized Quenched and Tempered Ductile Iron

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Abstract

Ductile iron with a matrix of ferrite plus martensite was produced using a ductile iron alloyed with ∼0.7 wt% manganese and ∼0.5 wt% nickel. Three different volume percentages of martensite (16, 24 and 37 vol %) were formed by austenitizing in the intercritical region (ferrite + austenite) followed by quenching in a polymeric solution to room temperature. The materials were evaluated in the untempered condition and after tempering at 400C (752F) and 500C (932F) for one hour. This paper reports the effects of volume percent martensite and tempering conditions on microstructure and tensile properties. Semi-quantitative chemistry and microhardness of ferrite and martensite were also determined as a function of martensite volume percent. The results indicated that the carbon available to form the austenite during intercritical austenitizing came mainly from the carbon in the matrix and that partitioning of substitutional elements is limited. The results also showed that ultimate and yield strength and hardness increased and elongation decreased as the volume fraction of martensite increased. Tempering significantly increased the elongation with only a small decrease in the strengths.

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References

  1. Sorelmetal, “The Sorelmetal Book of Ductile Iron,” vol. 1, pp. 123–30, Rio Tinto Iron and Titanium, Québec, Canada (2004).

  2. Rundman, K.B., “Heat Treating of Ductile Irons,” ASM Handbook Volume 04: Heat Treating, ASM International, pp. 682–692 (1991).

  3. Kobayashi, T., Yamamoto, H., “Development of High Toughness in Austempered Type Ductile Cast Iron and Evaluation of its Properties,” Met Trans A, vol. 19, pp. 319–327 (1988).

    Article  Google Scholar 

  4. Druschitz, A.P., Aristizabal, R.E., Druschitz, E., Hubbard, C.R., Watkins, T.R., Walker, L., Ostrander, M., “In-Situ Neutron Diffraction Studies of Intercritically Austempered Ductile Iron,” Met Trans A, vol. 43, Issue 5, pp. 1468–1476 (2012).

    Article  Google Scholar 

  5. Aristizabal, R.E., Druschitz, A.P., Druschitz, E., Bragg, R., Hubbard, C.R., Watkins, T.R., Ostrander, M., “Intercritically Austempered Ductile Iron,” AFS Transactions, vol. 119, pp. 407–413 (2011).

    Google Scholar 

  6. Druschitz, A.P., Aristizabal, R.E., Druschitz, E., Hubbard, C.R., Watkins, T.R., Ostrander, M., “Neutron Diffraction Studies of Intercritically Austempered Ductile Irons,” SAE International, Journal of Materials Manufacturing, vol. 4, pp. 111–118 (2011).

    Article  Google Scholar 

  7. Basso, A.D., Martinez, R.A., Sikora, J.A., “Influence of Austenitizing Temperatures on Microstructure and Properties of Dual Phase ADI,” Materials Science and Technology, vol. 23, pp. 1321–1326 (2007).

    Article  Google Scholar 

  8. Basso, A.D., Caldera, M., Chapetti, M., Sikora, J., “Mechanical Properties of Dual Phase Austempered Ductile Iron,” ISIJ International, vol. 50, pp. 302–306 (2010).

    Article  Google Scholar 

  9. Kilicli, V., Erdogan, M., “Tensile Properties of Partially Austenitised and Austempered Ductile Irons with Dual Matrix Structures,” Materials Science & Technology, vol. 22, pp. 919–928 (2006).

    Article  Google Scholar 

  10. Erdogan, M., Kilicli, V., Demir, B., “The Influence of Austenite Dispersion on Phase Transformation during the Austempering of Ductile Cast Iron Having a Dual Phase Matrix Structure”, International Journal of Materials Research, vol. 99, pp. 751–760 (2008).

    Article  Google Scholar 

  11. Kilicli V., Erdogan M., “The Strain-Hardening Behavior of Partially Austenitized and the Austempered Ductile Irons with Dual Matrix Structures,” Journal of Materials Engineering and Performance, vol. 17, pp. 240–249 (2008).

    Article  Google Scholar 

  12. Kilicli, V., Erdogan, M., “The Nature of the Tensile Fracture in Austempered Ductile Iron with Dual Matrix Microstructure,” Journal of Materials Engineering and Performance, vol. 19, pp. 142–149 (2010).

    Article  Google Scholar 

  13. Valdés, C., Pérez, M.J., Figueroa, M., Ramírez, L.E., “Austempered Ductile Irons with Dual Phase Matrix Structures,” Revista Mexicana de Fisica, vol. 55, pp. 48–51 (2009).

    Google Scholar 

  14. Erdogan, M., Kilicli, V., Demir, B., “Transformation Characteristics of Ductile Iron Austempered from Intercritical Austenitizing Temperature Ranges,” Journal of Materials Science and Engineering, vol. 44, pp. 1394–1403 (2009).

    Google Scholar 

  15. Basso, A.D., Sikora, J., “Review on Production Processes and Mechanical Properties of Dual Phase Austempered Ductile Iron,” International Journal of Metalcasting, vol. 6, pp. 7–14 (2012).

    Article  Google Scholar 

  16. Rashidi, M., Moshrefi-Torbati, M., “Effect of Tempering Conditions on the Mechanical Properties of Ductile Cast Iron with Dual Matrix Structure (DMS),” Materials Letters, vol. 45, pp. 203–207 (2000).

    Article  Google Scholar 

  17. Kocatepe, K., Cerah, M., Erdogan, M., “Effect of Martensite Volume Fraction and its Morphology on the Tensile Properties of Ferritic Ductile Iron with Dual Matrix Structures,” Journal of Materials Processing Technology, vol. 178, pp. 44–51 (2006).

    Article  Google Scholar 

  18. Cerah, M., Kocatepe K., Erdogan, M., “Influence of Martensite Volume Faction and Tempering Time on the Tensile Properties of Partially Austenitized in the (α+γ) Temperature Range and Quenched + Tempered Ferritic Ductile Iron,” Journal of Materials Science, vol. 40, pp. 3453–3459 (2005).

    Article  Google Scholar 

  19. ASTM International, “ASTM E8-04 Standard Test Methods for Tension Testing of Metallic Materials,” Annual Book of ASTM Standards, vol. 3.01, pp. 62–85 (2005).

    Google Scholar 

  20. Speich, G.R., Demarest, V.A., Miller R.L., “Formation of Austenite during Intercritical Annealing of Dualphase Steels,” Met. Trans. A, vol. 12, pp. 1419–1428 (1981).

    Article  Google Scholar 

  21. Taran, Y.V., Daymond, M.R., Schreiber, J., “Interplay of Stresses Induced by Phase Transformation and Plastic Deformation during Cyclic Load of Austenitic Stainless Steel,” Physica B, vol. 350, pp. 98–101 (2004).

    Article  Google Scholar 

  22. Jenkins, L.R., Forrest, R.D., “Ductile Iron” ASM Handbook, Volume 01: Properties and Selection: Irons, Steels, and High-Performance Alloys, pp. 33–55 (1990).

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Authors and Affiliations

  1. University of Antioquia, Medellín, Colombia

    R. Aristizabal

  2. The University of Alabama at Birmingham, Birmingham, AL, USA

    R. Foley

  3. Virginia Tech, Blacksburg, VA, USA

    A. Druschitz

Authors
  1. R. Aristizabal
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  2. R. Foley
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  3. A. Druschitz
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Aristizabal, R., Foley, R. & Druschitz, A. Intercritically Austenitized Quenched and Tempered Ductile Iron. Inter Metalcast 6, 7–14 (2012). https://doi.org/10.1007/BF03355534

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  • DOI: https://doi.org/10.1007/BF03355534

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