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Constitutive Modelling of Hot Deformation Behaviour of Mg-0.5wt% Ce Alloy

Deogade, BK and Bibhanshu, N and Kalsar, R and Acharyya, SG and Suresh, KS (2023) Constitutive Modelling of Hot Deformation Behaviour of Mg-0.5wt% Ce Alloy. In: Transactions of the Indian Institute of Metals .

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Official URL: https://doi.org/10.1007/s12666-023-03022-z


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 (ε˙) 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.

Item Type: Journal Article
Publication: Transactions of the Indian Institute of Metals
Publisher: Springer
Additional Information: The copyright for this article belongs to the Springer.
Keywords: Ce alloy; Constitutive equation; Deformation mechanism; Hot deformation; Mg; Processing map
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 24 Jul 2023 05:33
Last Modified: 24 Jul 2023 05:33
URI: https://eprints.iisc.ac.in/id/eprint/82607

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