Experimental investigation and comparative analysis of Ni-18.75 at. % Fe alloy plasticity, in coarse-grained and nano-crystalline states in the 4.2–350 K temperature range

The mechanical properties of a coarse-grained (CG) Ni-18.75 at. % Fe alloy, are studied in the temperature range of 4.2–350 K, under uniaxial compression and a constant strain rate. The average grain size is 35 μm. The temperature dependence of the yield stress is obtained, and the stress-strain curves are analyzed. The temperature dependences of flow stress, strain-rate sensitivity of flow stress, and the activation volume of plastic...