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首页> 外文会议>STP 1471; Symposium on Titanium, Niobium, Zirconium, and Tantalum for Medical and Surgical Applications; 20051109-10; Washington,DC(US) >Beta Titanium Alloy Processed for High Strength Orthopedic Applications
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Beta Titanium Alloy Processed for High Strength Orthopedic Applications

机译：Beta钛合金经过加工，可用于高强度骨科应用

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摘要

The general material requirements for Ti-15Mo have been standardized for surgical implant applications in ASTM F 2066. This particular standard is currently limited to one microstructural condition that is produced by beta solution treating and rapidly quenching the material to avoid the formation of alpha phase. When the alloy is processed in this way, it maintains a very high level of ductility but relatively low tensile and bending fatigue strengths. Since beta titanium alloys can be strengthened substantially by thermal processes that introduce alpha phase, it may be possible to adjust the microstructure to achieve a balance of properties that will meet the requirements for more highly stressed applications. Tensile and rotating beam fatigue data for several dual phase material conditions of Ti-15Mo indicate that the alloy can be strengthened substantially without introducing tensile notch sensitivity. However, it was necessary to use an alpha/beta annealing process and avoid beta solution treatment prior to aging at 480℃ to achieve this balance of properties. The potential benefits of alpha/beta processing appear to warrant expansion of ASTM F 2066 beyond the current beta solution treated and quenched condition.
机译：Ti-15Mo的一般材料要求已在ASTM F 2066中针对外科植入物应用进行了标准化。该特定标准目前仅限于一种通过β固溶处理并快速淬火以避免形成α相而产生的微观结构条件。当以这种方式加工合金时，它保持了很高的延展性，但拉伸和弯曲疲劳强度却相对较低。由于可以通过引入α相的热处理来实质上增强β钛合金，因此有可能调节微结构以实现性能平衡，从而满足更高应力应用的要求。 Ti-15Mo的几种双相材料条件下的拉伸和旋转梁疲劳数据表明，在不引入拉伸缺口敏感性的情况下，可以显着增强合金。但是，必须使用α/β退火工艺并避免在480℃老化之前进行β固溶处理，以达到这种性能平衡。 α/β加工的潜在好处似乎证明了ASTM F 2066的扩展范围已超出当前的β溶液处理和淬灭条件。

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