强脉冲激光照射TC11合金组织和抗氧化性能分析

为了改善TC11钛合金表面性能，采用强激光照射方法对其进行表面辐照处理，并研究脉冲能量密度对激光照射TC11钛合金表面形貌及性能的影响。结果表明，经过1J/cm2的强脉冲激光照射后，合金表面出现熔融，随着脉冲能量密度增大，合金表层的熔坑外径变大；激光照射后合金表层形成了约1.5μm外径的微孔，其构成元素主要为Mg，O，S，C；经脉冲照射处理后TC11合金显微硬度明显增大；当脉冲能量密度增加后，合金显微硬度也随之上升，合金试样的抗高温氧化性能得到明显的提升；合金表层形成的氧化物包含颗粒状和层状两种形貌类型，氧化物主要由Al₂O₃与Cr₂O₃构成。该研究对提高TC11钛合金表面抗氧化性能是有帮助的。

Microstructure and antioxidant properties of TC11 alloy irradiated by intense pulsed laser

In order to improve the performance of TC11 titanium alloy surface, the strong laser irradiation treatment was used, and then the influence of laser pulse energy density on TC11 titanium alloy surface morphology and performance was studied. The results show that after the laser irradiation by strong laser pulse of 1J/cm2, the surface of the alloy begins to melt, and with the increase of pulse energy density, the outer diameter of the molten hole in the alloy surface becomes larger. After laser irradiation, a micropore with outside diameter of about 1.5μm formed at the surface of the alloy, whose constituent elements were mainly Mg, O, S and C. The microhardness of TC11 alloy was significantly increased after pulse irradiation. When the pulse energy density increases, the microhardness of the alloy increases, and the anti-oxidation performance of the alloy sample is obviously improved. The oxides formed on the surface of the alloy consist of two types: Granule and lamellar. The oxide is mainly composed of Al₂O₃ and Cr₂O₃. The study is helpful to improve the surface properties of TC11 titanium alloy.