Achieving large near-linear elasticity, low modulus, and high strength in a metastable β-Ti alloy by mild cold rolling

Fu, Yu; Xiao, Wenlong; Rong, Jian; Ren, Lei; Peng, Huabei; Wen, Yuhua; Zhao, Xinqing; Ma, Chaoli

doi:10.1016/j.jmst.2023.11.066

Cited by 9 publications

(2 citation statements)

References 54 publications

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“…Similarly, the adjustment of SIMα ′′ can optimize the mechanical properties of titanium alloys. Researchers have conducted investigations on Ti-10V-2Fe-3Al [15], Ti-15Nb-5Zr-4Sn-1Fe [16], and Ti-6Al-4V [17] and have determined that the balance between strength and ductility in these materials can be achieved through the control of martensite content within the metastable β-phase. Additionally, Pilz et al [18] achieved 0.2% yield strength, reaching approximately 900 MPa, through a prolonged aging process of 108.0 ks.…”

Section: Introductionmentioning

confidence: 99%

Studying Plastic Deformation Mechanism in β-Ti-Nb Alloys by Molecular Dynamic Simulations

Wang,

Huang,

et al. 2024

Metals

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Using molecular dynamics (MD) simulations, the transition of the plastic deformation mechanism of Ti-Nb alloys during the tensile process was studied, and the effects of temperature, Nb composition, and strain rate on the deformation mechanism were also investigated. The results show that the deformation process of Ti-Nb alloys involves defect formation, followed by twinning and ω-phase transition, and ultimately, dislocation slip occurs. The <111>{112} slip makes the ω-phase easily overcome the transition energy barrier, inducing the phase transition in the twinning process. Increasing temperature will enhance the plasticity and reduce the strength of the material, while increasing Nb composition will have the opposite effect on the deformation. The simulations show a competition between twinning and dislocation slip mechanisms. With the increase in Nb content, the plastic deformation mechanism of the alloy will change from twinning to dislocation slip. In addition, the plastic strain range increases with the increase in the deformation rate in Ti-Nb alloys. At a higher strain rate, the alloy’s plastic strain range is affected by various deformation mechanisms, which significantly influence the plasticity of the material. The findings of this study provide further insights into the design of Ti-Nb-based alloys.

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Section: Introductionmentioning

confidence: 99%

Studying Plastic Deformation Mechanism in β-Ti-Nb Alloys by Molecular Dynamic Simulations

Wang,

Huang,

et al. 2024

Metals

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“…Previous studies have demonstrated the efficacy of cold rolling in enhancing mechanical properties. For instance, Fu et al [6] observed significant improvements in tensile strength and elastic modulus in the Ti-15Nb-5Zr-4Sn-1Fe alloy subjected to varying degrees of cold rolling. Similarly, Yumak et al [7] observed that the metastable β Ti alloy precipitated α phase after heat treatment (550 • C, 20 h), resulting in an increase in strength.…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of Metastable β Ti–25Nb–8Sn Alloy following Cold Rolling and Aging Treatments

Hsu,

Wu,

Jian

et al. 2024

Materials

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Metal implants require an elastic modulus close to cortical bone (<30 GPa) to avoid stress shielding and ensure adequate load-bearing strength. The metastable β-type Ti–25Nb–8Sn alloy has a low elastic modulus (52 GPa), but its yield strength (<500 MPa) needs enhancement. This study enhances Ti–25Nb–8Sn’s elastic admissible strain through cold rolling and aging heat treatments, investigating the microstructure’s impact on mechanical and corrosion properties. The results show that lower-temperature aging (<450 °C) leads to ω-phase precipitation, yielding a 300% increase in yield strength (>1900 MPa). However, this also increases the elastic modulus (~80 GPa), limiting the deformation ability. Higher-temperature aging (>500 °C) eliminates the ω phase, transforming it into α precipitates, resulting in a lower elastic modulus (~65 GPa) and improved deformation ability, with substantial yield strength (>1000 MPa). In summary, the optimal process conditions are determined as 90% cold rolling followed by aging treatment at 550 °C. Under these conditions, Ti–25Nb–8Sn achieves the most suitable yield strength (1207 MPa) and high corrosion resistance, retaining a relatively low elastic modulus (64.7 GPa) and high elastic admissible strain (1.93%). This positions it as an ideal material for biomedical implants.

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Enhancement of {110}<001> Texture by Controlling α‐phase and Achievement of Low Young's Modulus and High Strength in Metastable β‐type Ti–Zr‐Based Alloys

Tasaki,

Makioka,

Miyazaki

et al. 2024

Adv Eng Mater

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Achieving both low Young's modulus and high strength, which are essentially in a trade‐off relationship, is an important challenge in the field of biomaterials. Herein, the effects of oxygen and nitrogen addition on mechanical properties and recrystallization texture of a metastable Ti–18Zr–3Nb–3Sn–2Mo alloy are investigated. Both oxygen and nitrogen additions increase the apparent yield stress and tensile strength. The N‐added alloy exhibits an exceptionally strong {110}<001> texture, commonly referred to as Goss texture, leading to a lower Young's modulus when compared with the O‐added alloy. It is found that the formation and subsequent dissolution of the α‐phase plays an important role in the development of recrystallization texture. The {110}<001> texture can be enhanced in the O‐added alloy by a two‐step heat treatment, the first step to form the α‐phase and the second step to dissolve the α‐phase during recrystallization. An excellent combination of a low Young's modulus and a high yield stress is achieved in the O‐added alloy subjected to the two‐step heat treatment.

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Achieving large near-linear elasticity, low modulus, and high strength in a metastable β-Ti alloy by mild cold rolling

Cited by 9 publications

References 54 publications

Studying Plastic Deformation Mechanism in β-Ti-Nb Alloys by Molecular Dynamic Simulations

Studying Plastic Deformation Mechanism in β-Ti-Nb Alloys by Molecular Dynamic Simulations

Structure and Properties of Metastable β Ti–25Nb–8Sn Alloy following Cold Rolling and Aging Treatments

Enhancement of {110}<001> Texture by Controlling α‐phase and Achievement of Low Young's Modulus and High Strength in Metastable β‐type Ti–Zr‐Based Alloys

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