中文摘要：

biocompatible 的疲劳行为 Ni 免费的 Zr _60.14 Cu _22.31 Fe _4.85 艾尔 _9.7 Ag ₃基于 Zr 的体积金属性的玻璃(BMG ) 在房间温度(RT ) 在空中在 37 °C 并且与那些相比在模仿的身体液体(SBF ) 的 three-point-bending 测试下面被学习了。BMG 在 SBF 显示出近似 366MPa 的高疲劳限制，它在空(400MPa ) 中是比那稍微低的。疲劳裂缝趋于从象样品的演员组毛孔，包括和角落那样的缺点开始并且在 SBF 并且在空中在一条类似的路径宣传。三个不同区域，即一个裂缝开始区域，一个稳定的裂缝生长区域和一个不稳定的快破裂的区域清楚地在断裂疲劳的表面上被观察。尽管 pitting 在快克开始了的缺点发生了，它不显著地影响 BMG 的疲劳生活，因为在现在的 BMG 的一生被裂缝繁殖主要决定。学习 BMG 的高腐蚀疲劳限制从它的优秀腐蚀抵抗导致 SBF 并且内在地好坚韧。

英文摘要：

Fatigue behaviors of a biocompatible Ni-free Zr60.14Cu22.31Fe4.85Al9.7Ag3 Zr-based bulk metallic glass （BMG） have been studied under three-point-bending test in a simulated body fluid （SBF） at 37 ℃ and compared with those in air at room temperature （RT）. The BMG shows a high fatigue limit of approximately 366 MPa in SBF, which was slightly lower than that in air （400 MPa）. The fatigue cracks tended to initiate from the defects such as cast-pores, inclusions and corners of the samples and propagate in a similar path in SBF and in air. Three distinct regions, i.e. a crack-initiation region, a stable crack-growth region and an unstable fast-fracture region were clearly observed on the fatigue-fractured surface. Although pitting occurred at the defects where crack initiated, it does not affect significantly the fatigue life of the BMG, because the lifetime in the present BMG is mainly determined by crack propagation. The high corrosion-fatigue limit of the studied BMG results from its excellent corrosion resistance in SBF and intrinsically good toughness.