Short Crack Growth Behavior in Ferrite-Bainite Dual Phase Steels

Ashok Kumar; Kalyan Kumar Ray

doi:10.4028/www.scientific.net/KEM.592-593.753

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 592-593Short Crack Growth Behavior in Ferrite-Bainite...

Short Crack Growth Behavior in Ferrite-Bainite Dual Phase Steels

Abstract:

The effect of bainite content on the short crack growth behavior of three ferrite bainite dual phase steels has been examined using a rotating bending machine together with examinations of the microstructural constituents associated with the fatigue crack path. The magnitude of ΔK_thsc for ferrite bainite dual phase steels, in general, is found to increase with increasing amount of bainite. Critical examinations of the crack paths indicate that it is inter-granular for steels with < 70% bainite while it is intra-granular for steels containing > 70% bainite.

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Periodical:

Key Engineering Materials (Volumes 592-593)

Pages:

753-756

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.592-593.753

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Online since:

November 2013

Authors:

Ashok Kumar*, Kalyan Kumar Ray

Keywords:

Bainite, Dual Phase Steel, Fatigue, Fatigue Crack Growth Rate, Short Crack Fatigue Threshold, Volume Fraction

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