JMMCE  Vol.7 No.4 , December 2008
To Study the Effect of Austempering Temperature on Fracture Behaviour of Ni-Mo Austempered Ductile Iron (ADI)
ABSTRACT
Austempered Ductile Iron (ADI) can be as twice as strong as standard spheroidal iron at the same level of toughness. It responds to work-hardening surface treatments and exhibits excellent fatigue and wear property. There is extensive work done on the fracture of steel with ferrite or/and austenite structure, but little on fracture behaviour of ADI whose microstructure also comprises austenite and ferrite but with graphite nodules in the matrix. The present work is aimed in this direction. The fracture behavior of Ni-Mo ADI is studied. It is found that the crack always originates from graphite nodules and the matrix affects the propagation path.

Cite this paper
V. Chawla, U. Batra, D. Puri and A. Chawla, "To Study the Effect of Austempering Temperature on Fracture Behaviour of Ni-Mo Austempered Ductile Iron (ADI)," Journal of Minerals and Materials Characterization and Engineering, Vol. 7 No. 4, 2008, pp. 307-316. doi: 10.4236/jmmce.2008.74024.
References
[1]   R.J Warrick “Application of Ductile Iron Castings”. ASM Technical reports system no. 76-45.

[2]   Calangels and Heiser: Metallurgical Failure: A Wiley-Interscience publications.

[3]   J.C Morrison, “What’s’ in a name-nickel and ductile iron”. Technical paper in Indian Foundry Journal, 1998, Vol. 44(12).

[4]   Ashok Chaudhary and Charlie R. Brooks “Metallurgical Failure Analysis,” McGraw Hill publisher.

[5]   Ray Elliot: Cast Iron Technology, Jaico publishing house.

[6]   Z.Fan and R.E Smallman (1994) “Some observations of Austempered Ductile Iron”. Scripta Metallurgica et Materials journal, Vol.31 (2), 1994

 
 
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