Compound strengthening and dynamic characteristics of laser-induced double bubbles
Compound strengthening and dynamic characteristics of laser-induced double bubbles
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DOI：
10.1016/j.optlastec.2018.11.003
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发表时间：
2019-05
影响因子：
5
通讯作者：
Tong Yanqun;Wang Chao;S. Yuan;Kuiguo Han;Xiaoming Chen;Ning Yang;X. Ren
中科院分区：
文献类型：
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作者：
Tong Yanqun;Wang Chao;S. Yuan;Kuiguo Han;Xiaoming Chen;Ning Yang;X. Ren
激光诱导气泡强化技术由于其可控性，近年来得到了迅速发展。除了在水中和材料表面上观察到的气泡之外，单脉冲激光还诱导双气泡。利用高速摄像机对双气泡的动力学特性进行了研究。通过测量残余应力和表面形貌来评价强化效果。探讨了高温高压双气泡复合强化机理。结果表明，虽然两个气泡是同时产生的，但在水中和材料表面的双气泡的瞬态特性是不同的，如脉动周期和尺寸。双气泡强化性能取决于激光聚焦点与材料表面的距离。本研究提供了一种基于纳秒脉冲激光诱导双气泡强化的实用方法。
As a result of controllability, the new laser-induced bubbles strengthening technology has seen rapid development in recent years. Apart from bubbles observed in water and on a material surface, single-pulsed lasers induce double bubbles. The dynamic characteristics of double bubbles were investigated using a high-speed camera. The residual stress and the surface morphology were measured to evaluate the strengthening effect. The compound strengthening mechanism of double bubbles with high temperature and high pressure was discussed. The results show that the transient characteristics of double bubbles in water and on the surface of the material are different, such as the pulsation period and the size, although the two bubbles are induced at the same time. And the strengthening performance of double bubbles depends on the distance between the focus point of the laser and the material surface. This study provides a practical strengthening method based on double bubbles induced by nanosecond pulsed laser.