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首页> 外文期刊>Acta biomaterialia >Beta type Ti-Mo alloys with changeable Young's modulus for spinal fixation applications
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Beta type Ti-Mo alloys with changeable Young's modulus for spinal fixation applications

机译：β型Ti-Mo合金具有可变的杨氏固定应用的杨氏模量

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摘要

To develop a novel biomedical titanium alloy with a changeable Young's modulus via deformation-induced ω phase transformation for the spinal rods in spinal fixation devices, a series of metastable β type binary Ti-(15-18)Mo alloys were prepared. In this study, the microstructures, Young's moduli and tensile properties of the alloys were systemically examined to investigate the effects of deformation-induced ω phase transformation on their mechanical properties. The springback of the optimal alloy was also examined. Ti-(15-18)Mo alloys subjected to solution treatment comprise a β phase and a small amount of athermal ω phase, and they have low Young's moduli. All the alloys investigated in this study show an increase in the Young's modulus owing to deformation-induced ω phase transformation during cold rolling. The deformation-induced ω phase transformation is accompanied with {3 3 2} β mechanical twinning. This resulted in the maintenance of acceptable ductility with relatively high strength. Among the examined alloys, the Ti-17Mo alloy shows the lowest Young's modulus and the largest increase in the Young's modulus. This alloy exhibits small springback and could be easily bent to the required shape during operation. Thus, Ti-17Mo alloy is considered to be a potential candidate for the spinal rods in spinal fixation devices.
机译：为了通过变形诱导的血管ω相变，在脊柱固定装置中的脊柱杆的变形ω相变，制备了一系列亚稳态β型二元Ti-（15-18）莫合金的新型生物医学钛合金。在该研究中，系统地检查了合金的微观结构，杨氏模数和拉伸性能，以研究变形诱导的ω相变对其机械性能的影响。还检查了最佳合金的回弹。进行溶液处理的Ti-（15-18）Mo合金包含β相和少量的动脉ω相，它们具有低杨氏的Moduli。在本研究中研究的所有合金显示出在冷轧过程中由于变形诱导的ω相位变换而增加的杨氏模量的增加。变形诱导的ω相变伴随着{3 3 2}β机械孪晶。这导致维持具有相对高强度的可接受的延展性。在检查的合金中，Ti-17Mo合金显示出最低的杨氏模量和杨氏模量的最大增加。该合金表现出小的回弹，并且在操作期间可以容易地弯曲到所需的形状。因此，Ti-17MO合金被认为是脊柱固定装置中脊柱的潜在候选者。

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