Fatigue Crack Characteristics in Gradient Predeformed Pearlitic Steel under Multiaxial Loading
Daniel Gren,
Johan Ahlström,
Magnus Ekh
Abstract:Rolling contact fatigue of railway rails not only severely deforms the surface material near the rail head, but also induces an anisotropy in the mechanical behavior due to work hardening and alignment of the microstructure along the shear direction. Cracks typically initiate in this region and propagate along the aligned microstructure. The fatigue behavior of rails is evaluated under uniaxial loading in the undeformed material state. However, this is not representative of the contact loading condition and ma… Show more
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