Surface behavior of 16Cr3Al ODS steel—Effects of high laser intensity 1014 W/cm2 in ambiences of air, helium and vacuum
| Autor: | Milan S. Trtica, J. Stasic, J. Limpouch, Xizhang Chen, P. Gavrilov, Jovan Ciganović |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
10(14) W/cm(2) laser intensity Oxide chemistry.chemical_element 02 engineering and technology Radiation ODS steel 01 natural sciences 010305 fluids & plasmas law.invention chemistry.chemical_compound Impact crater law 0103 physical sciences General Materials Science Composite material Helium Civil and Structural Engineering Nuclear material Mechanical Engineering Femtosecond laser surface modification Plasma 021001 nanoscience & nanotechnology Laser Laser-induced damages/craters Nuclear Energy and Engineering chemistry 13. Climate action 0210 nano-technology Dispersion (chemistry) Intensity (heat transfer) |
| Zdroj: | Fusion Engineering and Design |
| Popis: | The behavior of 16Cr3Al ODS steel (oxide dispersion strengthened steel), widely employed structural fusion material, under high-intensity laser radiation with intensity up to 1014 W/cm2 was investigated in air, helium and vacuum surrounding. Employed system was 65 fs laser at 804 nm, with applied pulse energy up to 5.25 mJ. Morphological effects were studied – cracking, crater parameters (depth, cross-section), LIPSS (laser-induced periodic surface structures) formation at the crater periphery, hydrodynamic effects, as well as chemical variations on the surface. Ablation thresholds were also determined for all three ambiences (for 100 applied pulses), and they were 0.30 J/cm2, 0.23 J/cm2 and 0.39 J/cm2 in air, helium and vacuum, respectively. Plasma occurred in all experiments and it was most prominent in vacuum due to strongest laser-material coupling. |
| Databáze: | OpenAIRE |
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