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

被引：1
作者：
Silva, R. [1 ,2 ]
Silva, J.
Viana, C. C. [3 ]
Afonso, C. R. M. [1 ,2 ]
Hammer, P. [4 ]
Magalhaes, D. C. C. [1 ]
Plaine, A. H. [3 ]
Rovere, C. A. D. [1 ,2 ]
机构：
[1] Univ Fed Sao Carlos, Dept Mat Engn, Munir Rachid Corros Lab, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP, Brazil
[2] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Sao Carlos, Brazil
[3] Univ Estado Santa Catarina, Dept Mech Engn, BR-89219710 Joinville, SC, Brazil
[4] Sao Paulo State Univ, Inst Chem, BR-14800900 Araraquara, SP, Brazil
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2025年 / 35卷
基金：
巴西圣保罗研究基金会;
关键词：
beta-titanium alloy; ECAP; Microstructure; Young's modulus; Polarization; EIS; XPS analysis; ELASTIC-DEFORMATION BEHAVIOR; IN-VITRO BIOCOMPATIBILITY; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; TITANIUM-ALLOYS; YOUNGS MODULUS; PASSIVE FILMS; TI; MICROSTRUCTURE; PURE;
D O I：
10.1016/j.jmrt.2025.01.136
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 degrees C influences Young's modulus, hardness, and corrosion resistance. ECAP refines grain size and promotes nanocrystalline beta-phase grains, alpha" phase decomposition, and omega phase precipitation. Room temperature ECAP decreases Young's modulus by reducing the beta-phase stability due to deformation, while 300 degrees C processing enhances hardness and Young's modulus due to finer microstructure and higher omega-phase fraction. Grain refinement accelerates passivation kinetics, enhancing corrosion resistance with a thicker and less defective passive film, especially at 300 degrees C, without significant changes in the elemental composition of the outer passive film.
引用
收藏
页码：2055 / 2067
页数：13
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