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An Austempering Study of Ductile Iron and the Effect of Copper Addition on the Tensile Properties of Austempered Ductile Iron

S. K. Sahoo, S. C. Patnaik, S. Sen, J. Majhi

Abstract


Austempered Ductile Iron (ADI) has proved to be an excellent material as it possesses attractive properties like high strength, ductility and toughness combined with good wear resistance and machinability. These properties can be achieved upon adequate heat treatment which yields optimum microstructure for a given chemical composition. In this work, an investigation has been conducted on ductile iron alloyed with Cu and austempered in a range of time and temperatures. The influence of austempering temperature, time and copper addition on tensile strength and elongation of ADI has been determined. The tensile strength was found to increase with decreasing austempering temperature, with maximum tensile strength seen in samples austempered at lower temperature, 250 °C, and for shorter time. Maximum ductility was obtained after austempering for 1.5 h. An increase in the ductility of ADI was found on copper addition

Keywords


ausferrite, austempering, austempered ductile iron, tensile strength, % elongation

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References


Olivera Eric, Milan Jovanovic, Leposava S, et al. The austempering study of alloyed ductile iron. Materials and Design. 2006; 27:617–622p.

P. W. Shelton, A. A. Bonner. The effect of copper addition to the mechanical properties of austempered ductile iron (ADI). Material Processing Technology. 2006;173:269–274p.

James D. Mullins. Sorelmetal Review. March 2006.

I. C. H Hughes. Austempered ductile irons: Their properties and significance. Materials and Design. June/July 1985; 6(3):124–126p.

R. Premkumar, P. Dhanapal, S. S. Mohamed Nazirudeen. A Study on the influence of heat treatment on the wear resistance of alloyed austempered ductile iron. Indian Foundry Journal. 2009; 55(3).

Mahmoud Hafiz. Mechanical properties of SG-iron subjected to variable and isothermal austempering temperatures heat treatment. Materials Science and Engineering A. 2003; 340:1–7p.

Yoon-Jun Kim, Hocheol Shin, Hyounsoo Park, et al. Investigation into mechanical properties of austempered ductile cast iron (ADI) in accordance with austempering temperature. Materials Letters. 2008; 62:357–360p.

M Hafiz. Mechanical properties of SG iron subjected to variable and isothermal austempering temperatures heat treatment. Materials Science and Engineering. 2003; A340:1–7p.

G. P. Dubal. Salt bath quenching. Advanced Materials & Processes. 1999.

R. W. Foreman. New developments in salt bath quenching. Industrial Heating. 1993; 60(3):41–47p.

H. A. Abdel-Hakim, A. A. Attia, A. M. Baraka. Dissolution susceptibility of oxide species formed on mild steel during its oxidation in molten KNO3-NaNO3 eutectic mixture. Journal of Materials Engineering and Performance. 2002; 11(3):301–305p.

J. M. Radzikowska. Effect of specimen preparation on evaluation of cast iron microstructure. Materials Characterization. 2005; 54:287–304p.

Donald C. Zipperian. Metallographic Specimen Preparation Basics. Pace Technology. 2001.

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DOI: https://doi.org/10.37591/jomme.v3i2.2322

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