超常服役关键件纳秒激光改性延寿精确控制与温度极限研究

项目名称： 超常服役关键件纳秒激光改性延寿精确控制与温度极限研究

项目编号： No.51275556

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 任旭东

作者单位： 江苏大学

项目金额： 89万元

中文摘要： 青年科学基金项目是基于高压纳秒量级的疲劳件延寿机理基础研究。在激光加工改性延寿机理、系统疲劳寿命分析新方法等方面做出了部分贡献，创新提出激光冲击复合延寿理论并取得了突出应用效果。出版学术专著1本，发表论文18篇（SCI收录11篇、EI收录7篇），申请国际专利4件，发明专利10件，授权发明专利4件，国外学术会议大会报告2次。 申请项目是更深入更系统的研究：拟基于激光脉宽调制和光束质量优化，研究超常服役与运行环境（变动温度、波动载荷）关键件的激光改性延寿精确控制新原理；引入量子力学理论，重点提升激光吸收和回波过程中光子利用效率，建立基于纳秒光子吸收与材料相变的量子模型，发展具有较高精度的疲劳寿命预测模型。突破激光加工精确控制关键技术，掌控变温及波动载荷下激光改性延寿的温度极限，发展便于工程应用的材料改性延寿方法，解决一直以来困扰美国NASA的关键结构件激光强化温度极限难题。

中文关键词： 纳秒激光；改性延寿；脉宽调制；光束优化；温度极限

英文摘要： The project of Young Scientists Foundation was the fundamental research of the life extension mechanism of fatigue parts based on the high voltage nanosecond laser shock. Some contribution was made mainly on the mechanism of laser modification and life extension, and new analysis methods of systematic fatigue life and so on. The theory of the laser shock combined life extension was innovatively proposed, with satisfactory results. Publishing one academic monograph and 18 research papers (11 papers was quoted by SCI and the other was quoted by EI), applying for 4 international invention patents, 10 invention patents, 4 granted invention patents, and 2 times international science conference invited reports. The project was to study deeply and systematically: A new theory of laser shock modification and life extension about the key parts would be studied under the extreme service conditions and operating environment (fluctuating load and temperature) based on the technology of laser pulse-width modulation and beam optimum; The quantum model of nanosecond photon absorption and material transformation would be established by introducing quantum mechanics theory, mainly elevating photon utilization ratio in the laser absorption and echo-process, the prediction model of fatigue life would be developed. The key tec

英文关键词： Nanosecond Laser；Modification and life Extension；Pulse width modulation；Beam Optimization；Tenperature Limit