, 2019 激光冲击强化是一种先进表面技术,其利用激光诱导形成的等离子冲击波对金属材料进行强化,因具有强化效果更佳、可操控性更强和适用性更好等技术优势,得到了越来越广泛的应用与研究,对提高部件的疲劳性能和延长材料使用寿命具有重要作用。简要介绍了激光冲击强化技术的发展概况,分别从激光工艺参数、约束层与吸收保护层、冲击角度等影响参数进行了重点分析与总结。激光工艺参数是影响强化效果的最重要因素,选取最佳的激光功率密度、最优的光斑搭接率、适当的冲击次数以及合适的脉冲宽度可以明显提高强化效果。针对不同的材料形态 ...
陆莹 +6 more
core
, 2017 实验分析了不同工艺参数的激光冲击处理对5083铝合金力学性能的影响,结果表明:与未处理试样相比(336.44 MPa,99HV),经过激光能量密度4.47 GW/cm2与5.62 GW/cm2冲击处理后,试样的抗拉强度分别提升至347.02 MPa与353.13 MPa,硬度分别提高了17%与27%。同时,晶粒的尺寸与未处理试样相比明显变小,晶粒细化明显。综上所述 ...
徐子法, 张正, 宁成义, 张文武
core
, 2014 本发明公开了一种激光冲击强化过程工艺参数实时监测方法，包括如下步骤：1）在激光器的激光输出光路上设置一个与该激光器输出光路的夹角为75~85°的第一玻璃板，激光器输出的激光透过第一玻璃板对靶体进行冲击强化；2）在激光器输出的激光经过第一玻璃板反射的光路上设置一个与该光路的夹角为75~85°的第二玻璃板，在经过该第二玻璃板透射的光路上设置能量计，在该第二玻璃板反射的光路上设置光电探头；3）能量计采集的激光能量信息和光电探头采集的激光脉宽信息传送给处理系统。本发明通过在线检测经过反射的激光能量和激光脉宽 ...
黄晨光 +3 more
core
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