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首页> 外文期刊>Applied Surface Science >CO2 laser gas assisted nitriding of Ti-6Al-4V alloy
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CO2 laser gas assisted nitriding of Ti-6Al-4V alloy

机译：Ti-6Al-4V合金的CO2激光气体辅助氮化

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Laser gas assisted nitriding of Ti-6Al-4V alloy is carried out and nitride compounds formed and their concentration in the surface vicinity are examined. SEM, XRD and XPS are accommodated to examine the nitride layer characteristics. Microhardness across the nitride layer is measured. Temperature field and nitrogen distribution due to laser irradiation pulse is predicted. It is found that the nitride layer appears like golden color; however, it becomes dark gold color once the laser power irradiation is increased. The delta-TiN and epsilon-TiN are dominant phases in the surface vicinity. The needle like dendrite structure replace with the feathery like structure in the surface region due to high nitrogen concentration. No porous or microcracks are observed in the nitrided layer, except at high power irradiation, in this case, elongated cracks are observed in the surface region where the nitrogen concentration is considerably high. (c) 2005 Elsevier B.V. All rights reserved.
机译：对Ti-6Al-4V合金进行激光气体辅助氮化，并检查形成的氮化物及其在表面附近的浓度。装有SEM，XRD和XPS来检查氮化物层的特性。测量横跨氮化物层的显微硬度。可以预测由于激光辐照脉冲引起的温度场和氮分布。发现氮化物层看起来像金色。但是，一旦增加激光功率照射，它就会变成深金色。在表面附近，δ-TiN和ε-TiN是主要相。由于高氮浓度，针状树突结构在表面区域被羽毛状结构取代。除了在高功率照射下，在氮化层中没有观察到多孔或微裂纹，在这种情况下，在氮浓度相当高的表面区域中观察到拉长的裂纹。 （c）2005 Elsevier B.V.保留所有权利。

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