Abstract
Ce addition in Mg improves its restricted ductility owing to inadequate number of deformation systems being hcp structure. Hot compression conducted on Mg-0.5wt% Ce alloy to identify the suitable deformation regime in processing maps. The flow stress (σ) response of such plastic deformation is governed by constitutive equations, established by a physical model on 0.1 to 0.5 true strain (ε) depends on hyperbolic-sinusoidal Arrhenius-type equations and also initiated with Zener–Hollomon parameter (Z) as specified by strain rate (\(\dot{\varepsilon }\)) and deformation temperature. The average absolute relative error (AARE) and correlation coefficient (R) measure the correctness of the developed constitutive equation showing reasonable predictions of the modified flow stress. Processing map shows dynamic recovery (DRV) domain at 673–723 K and 0.001–0.1 s−1, corresponding to the suitable hot working regime, and also identifies unstable zones of flow stress behaviour.
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Acknowledgements
The authors would like to gratefully acknowledge Prof. Satyam Suwas for useful discussions, and Laboratory for Texture and Related Studies, Department of Materials Engineering, IISc, Bangalore, for providing the materials and experimental facilities. Authors, BKD, GSA and KSS, acknowledge the support from UGC – Networking Resource Centre for Materials (NRC-M) at IISc Bangalore.
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Deogade, B.K., Bibhanshu, N., Kalsar, R. et al. Constitutive Modelling of Hot Deformation Behaviour of Mg-0.5wt% Ce Alloy. Trans Indian Inst Met 76, 2953–2962 (2023). https://doi.org/10.1007/s12666-023-03022-z
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DOI: https://doi.org/10.1007/s12666-023-03022-z