University of Oulu

Ghosh, S., Hamada, A., Patnamsetty, M., Borek, W., Gouda, M., Chiba, A., & Ebied, S. (2022). Constitutive modeling and hot deformation processing map of a new biomaterial Ti–14Cr alloy. Journal of Materials Research and Technology, 20, 4097–4113.

Constitutive modeling and hot deformation processing map of a new biomaterial Ti–14Cr alloy

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Author: Ghosh, Sumit1; Hamada, Atef2; Patnamsetty, Madan3;
Organizations: 1Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, FI-90014, Finland
2Kerttu Saalasti Institute, Future Manufacturing Technologies (FMT) Unit, University of Oulu, Pajatie 5, 85500 Nivala, Finland
3Materials Science and Environmental Engineering, Tampere University, 33720, Tampere, Finland
4Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Ul. Konarskiego 18a, 44-100 Gliwice, Poland
5Mining and Petroleum Engineering Department Al-Azhar University Al Nasr Road, Nasr City, 11751, Cairo, Egypt
6Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
7Department of Production Engineering and Mechanical Design, Faculty of Engineering, Tanta University, Tanta, 31527, Egypt
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 7.4 MB)
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Language: English
Published: Elsevier, 2022
Publish Date: 2022-09-16


A new biomaterial Ti–14Cr alloy was designed for biomedical applications. The manufacturing process of Ti alloys through hot deformation is crucial for controlling the grain structure and the mechanical performance of the alloy. In the present study, several compression tests at elevated temperatures (1123–1273 K) and strain rate ranges of 0.01–10 s−1 were conducted using a Gleeble-3800 thermomechanical simulator. A processing map of the studied alloy was constructed using the principles of the dynamic material model to evaluate the hot workability and deformation mechanisms at different ranges of temperature and strain rate. The resulting grain structure was correlated with the processing map.

The processing map showed that adiabatic shear bands are expected to form at low temperatures (1123–1223 K) and moderate to high strain rates (1–10 s−1), whereas the nucleation of wedge cracks is likely to develop at the grain boundary at high temperatures and low strain rates (1248–1273/0.01 s−1). Consequently, a deterministic domain in the temperature and strain rate ranges of 1148–1273 K and 0.01–0.1 s−1, respectively, was identified as the domain of dynamic recrystallization with a peak efficiency of the order of ∼70% at 1173 K/0.01 s−1, and these were considered to be the optimum parameters for hot deformation. The constitutive flow behavior was modeled based on the hyperbolic–sinusoidal Arrhenius-type equations, and a mathematical relation was used to elucidate the influence of true strain on material constants.

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Series: Journal of materials research and technology
ISSN: 2238-7854
ISSN-E: 2214-0697
ISSN-L: 2238-7854
Volume: 20
Pages: 4097 - 4113
DOI: 10.1016/j.jmrt.2022.08.160
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: The authors express their gratitude to the Interreg Nord Program and the Regional Council of Lapland for funding this research through the InTeMP project, No. NYPS 20202486. Also, "Jane and Aatos Erkko Foundation” is appreciated for partly funding this study. Ebied expresses his gratitude to the Egyptian ministry of higher education and scientific research (missions sector) for funding his postdoctoral scholarship to produce the experimental material at Tohoku University, Japan.
Copyright information: © 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (