Deformation behaviour of the silicon doped metastable Fe50-xMn30Co10Cr10Six complex concentrated alloy using experiments and crystal plasticity simulations

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 885; p. 145620
• Main Authors: Jain, Roopam, Kumar, Mirtunjay, Biswas, Krishanu, Gurao, N.P.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 03.10.2023
• Subjects: Complex concentrated alloys; Crystal plasticity simulations; Deformation twinning; EBSD; Deformation twinning; Crystal plasticity simulations; Complex concentrated alloys; EBSD
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2023.145620

Deformation behaviour of transformative Fe50Mn30Co10Cr10 complex concentrated alloy doped with 0.2 wt % silicon is studied using ex-situ EBSD accompanied with mean and full field crystal plasticity simulations. On silicon doping, martensitic transformation gets suppressed rather nano twinning is observed with tensile deformation. The considerable rise in strength and tensile ductility is attributed to the solid solution strengthening and deformation twinning respectively. Furthermore, crystal plasticity simulations using mean field viscoplastic self-consistent and full field fast Fourier transform FFT approaches are performed to address the texture evolution, the effect of neighbouring grains of different orientations as well as slip and twin activity. Slip is found to be planar in nature which is verified using crystal plasticity simulations. Combination of mean and full field simulations is used to address the effect of neighbouring orientations on the rotation path of individual grains towards the stable end orientation. The critical role of deformation nano twinning in providing extended strain hardening contributing to significant ductility is established. This study highlights the importance of silicon doping in improving the mechanical properties of the Fe50Mn30Co10Cr10 CCA while offering valuable insights into the deformation mechanisms and crystallographic texture evolution. •Silicon doping increases the phase stability of the γ phase and supresses the martensitic transformation while promoting twinning.•Increase in strength and ductility due to solid solution strengthening and deformation twinning, respectively.•Combination of mean field VPSC and full field EVPFFT simulations is used to address the effect of neighbouring orientations.