Adiabatic shearing in railway wheel steel of high-speed train

Adiabatic shearing behavior in the web and the rim of high-speed train railway wheel steel was investigated using a split Hopkinson pressure bar (SHPB) with hat-shaped punch shear technique. Different initial microstructure characteristics were observed in the web and the rim specimens experiencing different heat treatment. For the first time we show that the pre-eutectoid ferrite deforms at first and pearlite interlamellar spacing has a significant influence on structural softening sequence during shear band evolution in the railway wheel steel, and shear bands are more prone to emerge in the rim.

Automated summary

Using the SHPB with hat-shaped punch shear technique, the adiabatic shearing behavior in the web and the rim of high-speed train railway wheel steel was investigated. Different initial microstructure characteristics were observed in the web and rim specimens with different heat treatment. It was shown for the first time that pre-eutectoid ferrite deforms at first and pearlite interlamellar spacing influences the structural softening sequence during shear band evolution in the railway wheel steel, with shear bands more prone to emerge in the rim.