Optimizing strength and corrosion resistance of the metastable β-alloy Ti–35Nb–7Zr–5Ta alloy by equal-channel angular pressing

R. Silva; J. Silva; C.C. Viana; C.R.M. Afonso; P. Hammer; D.C.C. Magalhães; A.H. Plaine; C.A.D. Rovere

Journal of Materials Research and Technology (Mar 2025)

Optimizing strength and corrosion resistance of the metastable β-alloy Ti–35Nb–7Zr–5Ta alloy by equal-channel angular pressing

R. Silva,
J. Silva,
C.C. Viana,
C.R.M. Afonso,
P. Hammer,
D.C.C. Magalhães,
A.H. Plaine,
C.A.D. Rovere

Affiliations

R. Silva: Munir Rachid Corrosion Laboratory, Department of Materials Engineering, Federal University of São Carlos, Rodovia Washington Luis Km 235, 13565-905, São Carlos, SP, Brazil; Federal University of São Carlos, Graduate Program in Materials Science and Engineering, Brazil; Corresponding author. Munir Rachid Corrosion Laboratory, Department of Materials Engineering, Federal University of São Carlos, Rodovia Washington Luis Km 235, 13565-905, São Carlos, SP, Brazil.
J. Silva: Department of Mechanical Engineering, State University of Santa Catarina, Paulo Malschitzki, 89219710, Joinville, SC, Brazil
C.C. Viana: Department of Mechanical Engineering, State University of Santa Catarina, Paulo Malschitzki, 89219710, Joinville, SC, Brazil
C.R.M. Afonso: Munir Rachid Corrosion Laboratory, Department of Materials Engineering, Federal University of São Carlos, Rodovia Washington Luis Km 235, 13565-905, São Carlos, SP, Brazil; Federal University of São Carlos, Graduate Program in Materials Science and Engineering, Brazil
P. Hammer: Institute of Chemistry, São Paulo State University, Araraquara, 14800-900, SP, Brazil
D.C.C. Magalhães: Munir Rachid Corrosion Laboratory, Department of Materials Engineering, Federal University of São Carlos, Rodovia Washington Luis Km 235, 13565-905, São Carlos, SP, Brazil
A.H. Plaine: Department of Mechanical Engineering, State University of Santa Catarina, Paulo Malschitzki, 89219710, Joinville, SC, Brazil; Corresponding author. Department of Mechanical Engineering, State University of Santa Catarina, Paulo Malschitzki, 89219710, Joinville, SC, Brazil.
C.A.D. Rovere: Munir Rachid Corrosion Laboratory, Department of Materials Engineering, Federal University of São Carlos, Rodovia Washington Luis Km 235, 13565-905, São Carlos, SP, Brazil; Federal University of São Carlos, Graduate Program in Materials Science and Engineering, Brazil; Corresponding author. Munir Rachid Corrosion Laboratory, Department of Materials Engineering, Federal University of São Carlos, Rodovia Washington Luis Km 235, 13565-905, São Carlos, SP, Brazil.

Journal volume & issue: Vol. 35
pp. 2055 – 2067

Abstract

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Controlling the microstructure of the Ti–35Nb–7Zr–5Ta alloy is fundamental for enhancing its strength and corrosion resistance in biomedical applications. This study examines how microstructural evolution through equal-channel angular pressing (ECAP) at room temperature and 300 °C influences Young's modulus, hardness, and corrosion resistance. ECAP refines grain size and promotes nanocrystalline β-phase grains, α'' phase decomposition, and ω phase precipitation. Room temperature ECAP decreases Young's modulus by reducing the β-phase stability due to deformation, while 300 °C processing enhances hardness and Young's modulus due to finer microstructure and higher ω-phase fraction. Grain refinement accelerates passivation kinetics, enhancing corrosion resistance with a thicker and less defective passive film, especially at 300 °C, without significant changes in the elemental composition of the outer passive film.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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