论文部分内容阅读
应用激光冲击强化技术(也叫激光喷丸)对TC4钛合金表面进行处理。由于其作用过程产生的高幅值压力(GPa量级)、短脉冲(ns量级)、高应变率(>106s-1)使材料表面实现纳米级晶粒细化成为可能,进而进一步提高材料表面性能。同时,应用该技术在TC4钛合金表面实现纳米级晶粒细化较少有系统的研究与报道。采用Q触发钕玻璃激光器,在一定条件、一定参数下,实现了TC4钛合金的表面纳米化,并对其形成机理进行阐述与分析。在实现材料自纳米化的同时,没有引入其它杂质粒子,保持了原母材的成分稳定性,且表面微动耐磨损性能得到了提高。开展该技术的深入研究,也可为材料表面纳米化提供另一种可行的途径与方法。
TC4 titanium alloy surface treatment using laser shock enhancement technology (also known as laser shot peening). Due to the high amplitude pressure (GPa), short pulse (ns) and high strain rate (> 106s-1) produced by the action process, it is possible to realize the nano-scale grain refinement on the surface of the material, thereby further improving the material Surface properties. At the same time, there are few systematic researches and reports on the application of this technology to realize nano-scale grain refinement on the surface of TC4 titanium alloy. Using Q-triggered neodymium glass laser, under certain conditions and under certain parameters, the surface nanocrystallization of TC4 titanium alloy was realized and its formation mechanism was described and analyzed. While realizing self-nanomaterialization of materials, no other impurity particles are introduced, the composition stability of the original base material is maintained, and fretting wear resistance of the surface is improved. To carry out in-depth study of the technology, but also for the nano-material surface provides another viable ways and means.