Mechanisms of ultrashort laser ablation in CrMnFeCoNi high-entropy alloy and stainless steel

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dc.contributor.authorRedka, David
dc.contributor.authorSpellauge, Maximilian
dc.contributor.authorMinár, Jan
dc.contributor.authorHuberHeinz Paul, Heinz Paul
dc.date.accessioned2025-05-19T19:17:52Z
dc.date.available2025-05-19T19:17:52Z
dc.date.issued2025
dc.description.abstract-translatedHigh-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.en
dc.description.sponsorshipEH22_008/0004634 Strojní inženýrství biologických a bioinspirovaných systémůcs
dc.format13 s.cs
dc.identifier.doihttps://doi.org/10.1016/j.apsusc.2024.162190
dc.identifier.urihttp://hdl.handle.net/11025/59178
dc.language.isoenen
dc.publisherElsevieren
dc.rights© CC BY 4.0en
dc.rights.accessopenAccessen
dc.subjectultrakrátká pulzní laserová ablacecs
dc.subjectlaserové zpracování materiálucs
dc.subjectkantorská slitinacs
dc.subjectúčinnost ablacecs
dc.subjectčasově rozlišená mikroskopie pump-probecs
dc.subjecttransfer-maticová metodacs
dc.subject.translatedultrashort pulse laser ablationen
dc.subject.translatedlaser material processingen
dc.subject.translatedcantor alloyen
dc.subject.translatedablation efficiencyen
dc.subject.translatedtime-resolved pump-probe microscopyen
dc.subject.translatedtransfer-matrix methoden
dc.titleMechanisms of ultrashort laser ablation in CrMnFeCoNi high-entropy alloy and stainless steelen
dc.typearticleen
dc.typečlánekcs
dc.type.statusPeer revieweden
dc.type.versionpublishedVersionen
local.files.count1*
local.files.size6191045*
local.has.filesyes*

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