Abstract
Shear band formation and evolution in Zr40Ti60 alloy impacted by split Hopkinson pressure bar at different strain rates were investigated. The critical compression strain for the initiation of the shear band was about 15%, and almost no changes were observed with increasing strain rate. The microstructure of the shear band with a width of 13 μm was characterised with elongated and broken grains. Moreover, nanosized dynamic recrystallisation grains (50–100 nm) were observed at the centre of the shear band with widths of 41 and 68 μm. In addition, the microhardness at the centre of the shear band decreased from 560 to 410 HV when the shear band width increased from 13 to 68 μm.
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