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Absorptance of Non-Ferrous Alloys to Nd:YLF and Nd:YAG Laser Light at Room Temperature
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik, fysik och matematik.
Laser Expertise Ltd., Nottingham, United Kingdom.
Luleå University of Technology.
Ansvarig organisation
2007 (Engelska)Ingår i: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 46, nr 8, s. 1290-1301Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The measurement of absorptance is important for the analysis and modelling of laser-material interactions. Unfortunately, most of the absorptance data presently available considers only polished pure metals rather than the commercially available (unpolished, oxidised) alloys which are actually being processed in manufacturing. This paper presents the results of absorptance measurements carried out at room temperature on as-received engineering grade non-ferrous metals (Al, Cu and Zn alloys). The measurements were made using an integrating sphere with an Nd:YLF laser at two wavelengths (1053nm and 527nm � which means that the results are also valid for Nd:YAG radiation at 1064nm and 532nm). The absorptance results obtained differ considerably from existing data for polished, pure metals and should help improve the accuracy of laser-material interaction models. Some clear trends were identified. For all 22 cases studied the absorptance was higher than for ideal pure, polished metals. For all Al- and Cu-samples the absorptance was higher for the green than it was for the infrared wavelength, while for all Zn-coatings this trend was reversed. No clear correlation between absorptance and surface roughness was found at low roughness values (Sa 0.15 � 0.60) but one, rougher set of samples (Sa 2.34), indicated a roughness-absorptance correlation at higher roughness levels.

Ort, förlag, år, upplaga, sidor
2007. Vol. 46, nr 8, s. 1290-1301
Nyckelord [en]
Laser materials processing; Integrating spheres; Roughness; Surface measurements, roughness.
Nationell ämneskategori
Materialteknik
Identifikatorer
URN: urn:nbn:se:miun:diva-4120DOI: 10.1364/AO.46.001290ISI: 000244637200015Scopus ID: 2-s2.0-34047132890Lokalt ID: 4763OAI: oai:DiVA.org:miun-4120DiVA, id: diva2:29152
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VR-Materials Science

Tillgänglig från: 2008-09-30 Skapad: 2009-11-02 Senast uppdaterad: 2017-10-31Bibliografiskt granskad
Ingår i avhandling
1. The Absorption of Laser Light by Rough Metal Surfaces
Öppna denna publikation i ny flik eller fönster >>The Absorption of Laser Light by Rough Metal Surfaces
2008 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Serie
Doctoral thesis / Luleå University of Technology, ISSN 1402-1544 ; 2008:08
Nyckelord
absorptance, reflectance, laser, metals, roughness, integrating sphere
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:miun:diva-6878 (URN)6064 (Lokalt ID)6064 (Arkivnummer)6064 (OAI)
Disputation
(Engelska)
Tillgänglig från: 2008-11-03 Skapad: 2008-11-03 Senast uppdaterad: 2009-03-10Bibliografiskt granskad

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Bergström, David

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