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Modelling of flow stresses during hot deformation of Ti–6Al–4Mo–1V–0.1Si alloy

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Abstract

The present study describes the hot deformation behaviour of a novel Ti–6Al–4Mo–1V–0.1Si alloy. The flow characteristics of the alloy were investigated in the strain rate range of 0.01 s−1 to 10 s−1 and at temperatures ranging from 800 to 1050 °C. The increase in deformation temperature and decrease in strain rate results in gradual decrease of flow stress. Flow softening was observed for deformation at lower temperatures (800–900 °C) due to lamellae kinking, whereas flat flow curve characteristics were observed for deformation at higher temperatures (950–1050 °C) due to a balance of dynamic recovery and recrystallization. The flow stress characteristics during hot deformation were predicted using constitutive modelling based on the Arrhenius hyperbolic sine equation. The strain rate sensitivity map was created for 0.69 strain. The optimum hot deformation zone was observed at 0.01 s−1 in the temperature range (925–1050 °C), and at strain rates of 1 s−1 and 5 s−1 from 900 to 975 °C.

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Acknowledgments

The authors are thankful to Director, VNIT Nagpur for providing the necessary facilities and constant encouragement to publish this paper.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Visvesvaraya National Institute of Technology (VNIT), South Ambazari Road, Nagpur, Maharashtra, 440010, India

    Diksha Mahadule, Tushar R. Dandekar & Rajesh K. Khatirkar

  2. Department of Materials Engineering, Indian Institute of Science (IISc), Bangalore, 560012, India

    Deepak Kumar & Satyam Suwas

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  1. Diksha Mahadule
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DM: Conceptualization, Methodology, Visualization, Investigation, Writing—Original Draft. DK: Methodology, Visualization, Writing—Review and Editing. TRD: Methodology, Visualization, Investigation. RKK: Conceptualization, Supervision, Writing—Review and Editing, Resources. SS: Supervision, Resources, Writing—Review and Editing.

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Mahadule, D., Kumar, D., Dandekar, T.R. et al. Modelling of flow stresses during hot deformation of Ti–6Al–4Mo–1V–0.1Si alloy. Journal of Materials Research 38, 3750–3763 (2023). https://doi.org/10.1557/s43578-023-01097-4

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