The original morphology of the oxide layer and the surface of the titanium alloy has a significant impact on manufacturing and processing. The laser cleaning pulse frequency amplitude affects the single pulse energy. It will affect the original morphology of the surface and the compositional changes of the laser-generated oxide layer. This work aims to study the effect of pulse frequency on the surface morphology and the composition of laser-generated oxide layer of the TA15 alloy surface in laser cleaning. With normal pulse frequency (70 kHz), the surface roughness increased to micrometer order. The striation morphology was formed, accompanied by melting. With high pulse frequency (700 kHz), the surface roughness (Ra) decreased to submicrometer order. The striation morphology and the melting phenomenon weakened and disappeared. The change in pulse frequency results in different chemical bonds on the surface. With normal pulse frequency, the oxide layer forming on the surface was mainly composed of TiO2 and a small amount of TiO. With high pulse frequency, the oxide layer forming on the surface was mainly composed of TiO. After laser cleaning, the self-corrosion current of the sample decreased by orders of magnitude compared with that of untreated samples. The corrosion resistance increased as the pulse frequency increased. The self-corrosion potential increased with an increase in the TiO amount.

中文翻译：

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TA15合金表面高脉冲频率激光清洗改性

氧化层和钛合金表面的原始形态对制造和加工有显着影响。激光清洗脉冲频率幅度影响单脉冲能量。它会影响表面的原始形态和激光产生的氧化层的成分变化。本工作旨在研究脉冲频率对激光清洗中TA15合金表面的表面形貌和激光生成氧化层组成的影响。在正常脉冲频率 (70 kHz) 下，表面粗糙度增加到微米级。形成条纹形态，伴随着熔化。在高脉冲频率 (700 kHz) 下，表面粗糙度 (Ra) 降至亚微米级。条纹形态和熔化现象减弱并消失。脉冲频率的变化导致表面上不同的化学键。在正常脉冲频率下，表面形成的氧化层主要由 TiO2 和少量 TiO 组成。在高脉冲频率下，表面形成的氧化层主要由 TiO2 组成。激光清洗后样品的自腐蚀电流与未经处理的样品相比降低了几个数量级。耐蚀性随着脉冲频率的增加而增加。自腐蚀电位随着 TiO2 用量的增加而增加。激光清洗后样品的自腐蚀电流与未经处理的样品相比降低了几个数量级。耐蚀性随着脉冲频率的增加而增加。自腐蚀电位随着 TiO2 用量的增加而增加。激光清洗后样品的自腐蚀电流与未经处理的样品相比降低了几个数量级。耐蚀性随着脉冲频率的增加而增加。自腐蚀电位随着 TiO2 用量的增加而增加。