Mechanisms of ultrashort laser ablation in CrMnFeCoNi high-entropy alloy and stainless steel
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F25%3A43974797" target="_blank" >RIV/49777513:23640/25:43974797 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11025/59178" target="_blank" >http://hdl.handle.net/11025/59178</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apsusc.2024.162190" target="_blank" >10.1016/j.apsusc.2024.162190</a>
Alternative languages
Result language
angličtina
Original language name
Mechanisms of ultrashort laser ablation in CrMnFeCoNi high-entropy alloy and stainless steel
Original language description
High-entropy alloys represent a promising class of materials with potential applications across engineering fields. This study aims to investigate the ultrashort pulse laser ablation dynamics of the high-entropy alloy CrMnFeCoNi in comparison to the conventional austenitic stainless steel AISI 304, focusing on correlating time-resolved pump-probe and post-ablation measurements. Using the transfer-matrix method with pump-probe microscopy, we quantitatively analyze spallation and phase explosion dynamics, linking transient reflectance changes to material-specific ablation mechanisms. Our findings reveal distinct differences in absorption within the ablation plume, with AISI 304 exhibiting a higher absorption of 0.35 compared to 0.2 for CrMnFeCoNi at three times the ablation threshold fluence. This difference indicates a stronger photothermal contribution in stainless steel, accounting for its lower ablation efficiency. Furthermore, the contrast of Newton rings can be well explained by the spallation depth, derived from post-ablation ablation depth measurements. Additionally, we provide insight into the birth (detachment at 10 ps) and death (dissolution between 3 ns and 5 ns) of the spallation layer, enhancing our understanding of transient ablation dynamics. The comprehensive analysis of the transient ablation dynamics, along previously reported post-ablation metrics, provides valuable insights into the laser processing of high-entropy alloys with stainless steel as reference.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/EH22_008%2F0004634" target="_blank" >EH22_008/0004634: Mechanical engineering of biological and bio-inspired systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Surface Science
ISSN
0169-4332
e-ISSN
1873-5584
Volume of the periodical
686
Issue of the periodical within the volume
MAR 30 2025
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
13
Pages from-to
nestránkováno
UT code for WoS article
001403039000001
EID of the result in the Scopus database
2-s2.0-85213202800