Abstract TiB-reinforced Ti-3Al-2.5V, in which TiB whiskers are oriented parallel to the direction of heat extrusion, was fabricated. To investigate the effects of TiB whisker orientation on fatigue properties in Ti-3Al-2.5V, four-point bending fatigue tests were conducted for plate-type specimens having three different orientations of TiB whiskers. The fatigue limit and fatigue life of Ti-3Al-2.5V having TiB whiskers, which are oriented parallel to the loading direction, were high. This is because the resistances of fatigue crack initiation and propagation were changed with the TiB orientation in Ti-3Al-2.5V. Thus, fatigue properties in the Ti-3Al-2.5V having TiB whiskers depended on TiB orientation.

中文翻译：

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TiB取向对热挤压处理TiB增强Ti-3Al-2.5V合金四点弯曲疲劳性能的影响

摘要 制备了 TiB 增强的 Ti-3Al-2.5V，其中 TiB 晶须的取向平行于热挤压方向。为了研究 TiB 晶须取向对 Ti-3Al-2.5V 疲劳性能的影响，对具有三种不同 TiB 晶须取向的板状试样进行了四点弯曲疲劳试验。具有平行于加载方向取向的 TiB 晶须的 Ti-3Al-2.5V 的疲劳极限和疲劳寿命很高。这是因为在 Ti-3Al-2.5V 中，随着 TiB 取向的变化，疲劳裂纹萌生和扩展的阻力发生了变化。因此，具有 TiB 晶须的 Ti-3Al-2.5V 的疲劳性能取决于 TiB 取向。