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Statements

Subject Item
n2:RIV%2F49777513%3A23520%2F06%3A00000358%21RIV07-MSM-23520___
rdf:type
skos:Concept n16:Vysledek
dcterms:description
Experimental system for nanosecond laser melting investigation was developed containing three independent noncontact methods: infrared radiometry, time-resolved reflectivity of He-Ne laser and sample surface reflected KrF heating laser pulse. The system was applied to the investigation of laser melting of Cu, Mo, Ni, Si, Sn, Ti steel ČSN 15330 and stainless steel ČSN 17246 samples. For metallic samples the IR radiometry signal was transformed to temperature. Obtained surface temperature and reflectivity spectra in nanosecond time scale (10-1000 ns) for wide range of energy densities are presented. Interesting evolutions were found. Melting thresholds and melting durations were determined from the measured curves. The applicability of the methods is evaluated. Experimental system for nanosecond laser melting investigation was developed containing three independent noncontact methods: infrared radiometry, time-resolved reflectivity of He-Ne laser and sample surface reflected KrF heating laser pulse. The system was applied to the investigation of laser melting of Cu, Mo, Ni, Si, Sn, Ti steel ČSN 15330 and stainless steel ČSN 17246 samples. For metallic samples the IR radiometry signal was transformed to temperature. Obtained surface temperature and reflectivity spectra in nanosecond time scale (10-1000 ns) for wide range of energy densities are presented. Interesting evolutions were found. Melting thresholds and melting durations were determined from the measured curves. The applicability of the methods is evaluated. Byl vytvořen experimentální systém pro zkoumání nanosekundového laserového tavení obsahující tři nezávislé bezkontaktní metody: infračervenou radiometrii, časově rozlišenou odrazivost He-Ne laseru a povrchem vzorku odražený KrF výkonový laserový pulz. Systém byl použit pro zkoumání laserového tavení vzorků Cu, Mo, Ni, Si, Sn, Ti, ocel ČSN 15330 a nerez ocel ČSN 17246. Pro kovové vzorky byl IR signál převeden na teplotu. Prezentovány jsou získané závislosti povrchové teploty a odrazivosti na čase v nanosekundovém měřítku (10-1000ns) pro širokou oblast hustot energií (100-5500 mJ cm-2) laserového svazku. Byly nalezeny zajímavé závislosti. Ze změřených křivek byly určeny práh tavení a doba existence taveniny. Je zh
dcterms:title
Nanosecond pulse laser melting investigation by IR radiometry and reflection-based methods Zkoumání nanosekundového pulzního laserového tavení pomocí IR radiometrie a odrazivých metod Nanosecond pulse laser melting investigation by IR radiometry and reflection-based methods
skos:prefLabel
Nanosecond pulse laser melting investigation by IR radiometry and reflection-based methods Zkoumání nanosekundového pulzního laserového tavení pomocí IR radiometrie a odrazivých metod Nanosecond pulse laser melting investigation by IR radiometry and reflection-based methods
skos:notation
RIV/49777513:23520/06:00000358!RIV07-MSM-23520___
n3:strany
1170
n3:aktivita
n18:Z
n3:aktivity
Z(MSM4977751302)
n3:cisloPeriodika
0
n3:dodaniDat
n11:2007
n3:domaciTvurceVysledku
n6:5275741 n6:6190790
n3:druhVysledku
n10:J
n3:duvernostUdaju
n5:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
487641
n3:idVysledku
RIV/49777513:23520/06:00000358
n3:jazykVysledku
n13:eng
n3:klicovaSlova
nanosecond pulsed laser melting; melting duration; melting threshold; infrared radiometry; surface temperature measurement; time resolved reflectivy; experimental
n3:klicoveSlovo
n7:infrared%20radiometry n7:time%20resolved%20reflectivy n7:melting%20duration n7:melting%20threshold n7:surface%20temperature%20measurement n7:nanosecond%20pulsed%20laser%20melting n7:experimental
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[80804F5A1864]
n3:nazevZdroje
Applied Surface Science
n3:obor
n8:BL
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:rokUplatneniVysledku
n11:2006
n3:tvurceVysledku
Semmar, Nadjib Martan, Jiří Cibulka, Ondřej
n3:zamer
n17:MSM4977751302
s:issn
0169-4332
s:numberOfPages
8
n15:organizacniJednotka
23520