Rotating bending fatigue tests were carried out on austempered ductile iron containing 1.5 wt% nickel and 0.3 wt% molybdenum. The ductile iron was austenitized at 900 or 1050 °C and then austempered at 280 or 400 °C for different lengths of time to obtain different microstructures. The fatigue strength was correlated with the amount of retained austenite and its carbon content, which were both determined by X-ray diffraction technique. While the tensile strength decreased with increasing retained austenite content, the fatigue strength was found to increase. Carbide precipitation was found to be detrimental to fatigue strength. Lower austenitizing temperature resulted in better fatigue strength. © 1994 Chapman & Hall.

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dc.contributor.authorShanmugam, P.
dc.contributor.authorPrasad Rao, P.
dc.contributor.authorRajendra Udupa, K.
dc.contributor.authorVenkataraman, N.
dc.date.accessioned2026-02-05T11:00:36Z
dc.date.issuedEffect of microstructure on the fatigue strength of an austempered ductile iron
dc.description.abstract1994
dc.identifier.citationJournal of Materials Science, 1994, 29, 18, pp. 4933-4940
dc.identifier.issn222461
dc.identifier.urihttps://doi.org/10.1007/BF00356546
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/28078
dc.publisherKluwer Academic Publishers
dc.subjectAustenite
dc.subjectBending (deformation)
dc.subjectCorrelation methods
dc.subjectFatigue of materials
dc.subjectFatigue testing
dc.subjectHeat treatment
dc.subjectMetallographic microstructure
dc.subjectMolybdenum
dc.subjectNickel
dc.subjectPrecipitation (chemical)
dc.subjectStrength of materials
dc.subjectX ray analysis
dc.subjectAustempered ductile iron
dc.subjectAustempering
dc.subjectAustenitization
dc.subjectFatigue strength
dc.subjectTensile strength
dc.subjectX ray diffraction
dc.subjectIron
dc.titleRotating bending fatigue tests were carried out on austempered ductile iron containing 1.5 wt% nickel and 0.3 wt% molybdenum. The ductile iron was austenitized at 900 or 1050 °C and then austempered at 280 or 400 °C for different lengths of time to obtain different microstructures. The fatigue strength was correlated with the amount of retained austenite and its carbon content, which were both determined by X-ray diffraction technique. While the tensile strength decreased with increasing retained austenite content, the fatigue strength was found to increase. Carbide precipitation was found to be detrimental to fatigue strength. Lower austenitizing temperature resulted in better fatigue strength. © 1994 Chapman & Hall.

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