Journal
APPLIED SURFACE SCIENCE
Volume 255, Issue 5, Pages 3097-3103Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2008.08.098
Keywords
Atomistic-macroscale modeling; Nanosecond laser-material interaction; Phase change
Categories
Funding
- Iowa State University
- NSF [0457471]
- Air Force Office for Scientific Research
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0457471] Funding Source: National Science Foundation
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In this work, large-scale hybrid atomistic-macroscale simulation is performed to study the long-time material behavior in nanosecond laser-material interaction. Different phase change phenomena are studied, including solid-liquid interface speed, temperature, maximum melting depth, and ablation rate. Full solidi. cation/epitaxial re-growth is observed within 60 ns for the laser fluence of 5 J/m(2). Strong fluctuation is observed at the solid-liquid interface and surface of the molten pool. No visible superheating is observed at the solid-liquid interface. For the laser fluences studied in this work, an almost linear relationship is observed between the ablation yield and the laser fluence, indicating weak phase explosion. (C) 2008 Elsevier B.V. All rights reserved.
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