Fretting damage is common in the high-strength titanium alloy fastener widely used in the aeronautic industry, leading to the failure of fastening fit or the initiation of crack. The titanium alloy fasteners often have typical preferred orientation characteristics (i.e., texture), and this is one of the important factors affecting its performance. However, the investigations on the mechanism of β rolling-texture intensity on fretting damage resistance and subsurface deformation are less addressed. Hence, fretting wear tests were carried out on samples with different rolling texture intensities. The results demonstrate that the samples with quite low (A-10 % sample) and quite high (D-70 % sample) rolling-texture intensity both exhibit excellent fretting wear resistance, but their mechanisms are completely different. Uniformly dispersed grain orientation renders the A-10 % sample with good recovery ability and a positive friction effect during wear. Low stress only concentrating at grain boundaries (GBs) weakens cracks’ initiation and propagation. The unique orientation-layered structure (OLS) leads to excellent recovery ability and a positive friction effect. Crack propagation is inhibited and only propagates along the OLS boundary without a connected trend. However, samples with moderate rolling texture intensity exhibit severe wear. Dislocations are restricted in local areas, so the poor recovery ability makes them have a negative friction effect. Crack propagation driving force continuously increases. Appropriate rolling texture intensity can reduce wear by three times. This study can provide information on the principle for designing fretting damage-resistant alloys.

中文翻译：

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轧制织构强度对高强度钛合金微动损伤和亚表面变形行为的影响

航空工业广泛使用的高强度钛合金紧固件经常发生微动损伤，导致紧固配合失效或产生裂纹。钛合金紧固件往往具有典型的择优取向特征（即织构），这是影响其性能的重要因素之一。然而，β轧制织构强度对微动损伤抗力和亚表面变形的影响机制的研究较少。因此，对具有不同滚动织构强度的样品进行了微动磨损试验。结果表明，滚动织构强度较低（A-10%样品）和较高（D-70%样品）的样品均表现出优异的耐微动磨损性能，但其机制完全不同。均匀分散的晶粒取向使 A-10% 样品在磨损过程中具有良好的恢复能力和积极的摩擦效果。仅集中在晶界 (GB) 处的低应力会削弱裂纹的萌生和扩展。独特的取向层状结构（OLS）具有出色的恢复能力和正摩擦效应。裂纹扩展受到抑制，仅沿 OLS 边界扩展，没有连接趋势。然而，具有中等滚动纹理强度的样品表现出严重的磨损。位错被限制在局部区域，因此较差的恢复能力使其产生负摩擦效应。裂纹扩展驱动力不断增大。适当的滚动纹理强度可以减少三倍的磨损。这项研究可以为抗微动损伤合金的设计原理提供信息。