Simultaneously improving the strength and ductility of coarse-grained Hadfield steel with increasing strain rate

In general, the strength of coarse-grained metals rises with increases in the strain rate, while the ductility decreases. However, the strength and ductility of Hadfield steel increased simultaneously with an increase in the strain rate. A maximum elongation of 64% combined with true strength of 1596 MPa was obtained at a high strain rate of 1 × 101 s−1. This is associated with the fact that Hadfield steel exhibits more strain-induced deformation twins at higher strain rates.