Stainless steel in an electronically excited state

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00640323" target="_blank" >RIV/68378271:_____/25:00640323 - isvavai.cz</a>
Alternative codes found
RIV/61389021:_____/25:00648107
Result on the web
<a href="https://hdl.handle.net/11104/0370728" target="_blank" >https://hdl.handle.net/11104/0370728</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6463/ae0fa3" target="_blank" >10.1088/1361-6463/ae0fa3</a>

Result language
angličtina
Original language name
Stainless steel in an electronically excited state
Original language description
Understanding the non-equilibrium behavior of stainless steel under extreme electronic excitation remains a critical challenge for laser processing and radiation science. We employ a hybrid framework integrating density-functional tight binding, transport Monte Carlo, and Boltzmann equations to model austenitic stainless steel (Fe0.5875Cr0.25Mn0.09Ni0.07C0.0025) under ultrafast irradiation. The developed approach uniquely bridges atomic-scale electronic dynamics and mesoscale material responses, enabling the quantitative mapping of electron-temperature-dependent properties (electronic heat capacity, thermal conductivity, and electron–phonon coupling) up to the electronic temperatures Te ∼ 25 000 K. Two distinct lattice disordering mechanisms are identified: nonthermal melting at Te ∼ 11 400 K (the dose ∼1.8 eV atom−1), where the lattice collapses on sub-picosecond timescales without atomic heating driven by electronic excitation modifying the interatomic potential, and thermal melting (at ∼0.45 eV atom−1), induced by electron–phonon coupling on picosecond timescales. The derived parameters enable predictive modeling of stainless steel under extreme conditions, with implications for laser machining and radiation-resistant material design.
Czech name
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Czech description
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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
10306 - Optics (including laser optics and quantum optics)

Project
<a href="/en/project/LM2023068" target="_blank" >LM2023068: Prague Asterix Laser System</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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