激光喷丸对TC17钛合金恒温抗氧化性能的影响  

Effect of Laser Peening on Isothermal Oxidation Resistance Property of TC17Titanium Alloys

作　　者：黄帅[1] 朱颖[2] 郭伟[2] 彭鹏[2] 刁训刚[1] 

机构地区：[1]北京航空航天大学物理科学与核能工程学院,北京100191 [2]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《激光与光电子学进展》2017年第12期240-246,共7页Laser & Optoelectronics Progress

基　　金：国家国际科技合作专项(2013DFR50590)

摘　　要：利用高功率、短脉冲Nd:YAG激光对TC17钛合金进行了激光喷丸(LP)处理,并在400℃温度下进行了恒温氧化增重试验,分析了LP对钛合金恒温氧化性能的影响。研究结果表明,相较于LP前,LP后TC17钛合金在400℃下的恒温氧化增重减小了64.9%;材料表面的氧化膜更加致密,能更有效阻挡氧的扩散。表面能谱分析结果显示,LP后氧化试样表面的Cr比未喷丸处理的多。大量的Cr能改善氧化层与基体间的附着力,因此LP可以改善钛合金的恒温抗氧化性能。With a high-power and short-pulse Nd：YAG laser, TC17 titanium alloys are processed by laser peening （LP）, the isothermal oxidation weight gain experiment at the temperature of 400 ℃ is carried out, and the effect of LP on the isothermal oxidation performance of titanium alloys is analyzed. The study results show that, as for the TC17 titanium alloys after LP, if compared with those before LP, the isothermal oxidation weight gain at 400 ℃ decreases by 64.9 %, and the oxide film on the material surface becomes more dense, which can resist the oxygen diffusion more effectively. The surface energy spectral analysis results show that the Cr on the surface of the oxidized sample after LP is more than that before LP. A large amount of Cr can improve the adhesive force between the oxide layer and the substrate, and thus LP can improve the isothermal oxidation resistance property of titanium alloys.

关 键 词：激光技术 激光材料加工 激光喷丸 TC17钛合金 恒温氧化增重 微观组织 

分 类 号：TN249[电子电信—物理电子学]