TITLE:
To Study the Effect of Austempering Temperature on Fracture Behaviour of Ni-Mo Austempered Ductile Iron (ADI)
AUTHORS:
Vikas Chawla, Uma Batra, D. Puri, Amita Chawla
KEYWORDS:
Austempered ductile iron (ADI), Fractography, Dimpled structure, Fracture, Fracture mode.
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.7 No.4,
December
20,
2008
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.