Simulation and experimental characterization of VC precipitation and recovery stress formation in an FeMnSi-based shape memory alloy

In this study, TC-PRISMA was employed to simulate the precipitation (number density and radius) of an FeMnSi-based shape memory alloy (FeMnSi-SMA), with a chemical composition Fe–17Mn–5Si–10Cr–4Ni-1(V, C) (wt%), during one-step two-step aging processes. addition, transmission electron microscopy (TEM) used study microstructures specimens, particularly VC precipitates, under several selected conditions validate simulation results. Furthermore, thermomechanical characterization conducted investigate recovery stress FeMnSi-SMA conditions. It found that, compared only aging, first at lower temperature (600 °C) followed by second higher (670 can take advantage both high nucleation rate growth rate. This achieves similar state in significantly shorter time (approximately 1/6 total duration one aging). The value (509 MPa) corresponding condition (first step: 600 °C for 20 h; 670 6 h) shows range (514 144 h); however, fracture strain is 40% higher. number radii simulated are generally consistent TEM observations.