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首页> 外文会议>Symposium on structural biomaterials for the 21st century >Fretting Fatigue Behaviors of Ti-6Al-4V ELI and Ti-6Al-7Nb for Biomedical Applications
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Fretting Fatigue Behaviors of Ti-6Al-4V ELI and Ti-6Al-7Nb for Biomedical Applications

机译：用于生物医学应用的Ti-6Al-4V Eli和Ti-6Al-7NB的疲劳疲劳行为

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Effects of fretting on fatigue of Ti-6Al-4V ELI and Ti-6Al-7Nb with equiaxed a microstructure as biomaterials are investigated in present work. The testing was conducted in air at room temperature feet under conditions of frequency, f, =10, stress rate, R, =0.1, and a normal clamping pressure of about 30MP, using dogbone-shaped specimens and bridge-type pads with flat. The fretting-fatigue limits of the alloys are dramatically lower than their plain-fatigue limits. The contact areas are fretted heavily, and every scar consists of a stick region in the middle and two slip regions beside. Lots of surface cracks exist in the fretted areas. The dramatic reduction of fatigue life is ascribed to the increased stress intensity factor of the crack in early stage due to the cooperative action of alternating bulk stress, frictional force and normal stress under fretting condition. The fracture features and the angle of the crack propagation to the specimen surface of fretting fatigue are different from those of plain fatigue.
机译：在本作研究中，研究了在Ti-6Al-4V Eli和Ti-6AL-7NB疲劳中进行疲劳的影响，作为生物材料的微观结构。在频率，F，= 10，应力速率，R，= 0.1的条件下，在室温脚下在空气中进行测试，使用狗耳形标本和具有平坦的桥式焊盘，r，= 0.1，= 0.1，= 0.1，= 0.1的正常夹紧压力。合金的疲劳疲劳极限显着低于它们的平淡疲劳极限。接触区域很烦恼，并且每个疤痕都在于中间的棒区域和旁边的两个滑动区域。漂移区域存在很多表面裂缝。由于交替散装应力，摩擦力和常规应力下的发射条件下的协同作用，疲劳寿命的显着降低对早期裂缝的应力强度因子增加。裂缝特征和裂纹传播对疲劳疲劳的样本表面的裂缝传播不同于平滑疲劳。

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