Abstract
This work investigates the influence of pulse energy on machining characteristics using a 10 ps laser during Laser induced plasma micromachining (LIPMM) process. An axisymmetric model combining the effects of cascade, multiphoton ionization, and recombination and diffusion losses was developed to simulate the spatial and temporal plasma profiles at various pulse energies in distilled water. Thereafter, micro-channels with the corresponding pulse energies were created on stainless steel using LIPMM, and the plasma focusing process, depth and width of the machined channels were investigated. It was found that pulse energy had a negligible effect on the variation of the focusing distance during the LIPMM focusing process. The simulations and experimental geometric features showed similar qualitative trends with the increasing pulse energy at the plasma's focal plane. However, the pulse energy had a significant influence on the machined depth, but a much lesser influence on the machined width.
Original language | English (US) |
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Pages (from-to) | 85-94 |
Number of pages | 10 |
Journal | Journal of Materials Processing Technology |
Volume | 262 |
DOIs | |
State | Published - Dec 2018 |
Funding
This work was financially supported by National Natural Science Foundation of China ( 51705258 ), Natural Science Foundation of Jiangsu Province ( BK20150685 ), the Fundamental Research Funds for the Central Universities ( KYZ201659 ), and the Foundation for Distinguished Young Talents, College of Engineering, Nanjing Agricultural University ( YQ201604 ).
Keywords
- Laser induced breakdown
- Laser induced plasma micromachining
- Micro-channel geometry
- Plasma focusing process
- Plasma simulation
ASJC Scopus subject areas
- Ceramics and Composites
- Computer Science Applications
- Metals and Alloys
- Industrial and Manufacturing Engineering