Compound strengthening and dynamic characteristics of laser-induced double bubbles
| Autor: | Kuiguo Han, Wang Chao, Tong Yanqun, Ning Yang, Xudong Ren, Xiaoming Chen, S.Q. Yuan |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology Nanosecond pulse 010402 general chemistry 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention Physics::Fluid Dynamics Residual stress law High pressure Electrical and Electronic Engineering Composite material 0210 nano-technology Laser processing |
| Zdroj: | Optics & Laser Technology. 113:310-316 |
| ISSN: | 0030-3992 |
| DOI: | 10.1016/j.optlastec.2018.11.003 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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