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The absorptance of steels to Nd:YLF and Nd:YAG laser light at room temperature
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
Laser Expertise Ltd., Nottingham, United Kingdom.
Luleå University of Technology.
Responsible organisation
2006 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 253, no 11, 5017-5028 p.Article in journal (Refereed) 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 steels including hot and cold rolled mild steel and stainless steels of various types. The measurements were made using an integrating sphere with an Nd:YLF laser at two wavelengths (1053 and 527 nm, which means that the results are also valid for Nd:YAG radiation at 1064 and 532 nm). 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 materials studied, the absorptance was considerably higher than the previously published values for the relevant pure metals with polished surfaces. For all 15 samples the absorptance was higher for the green than for the infrared wavelength. No clear trend correlating the absorptance with the roughness was found for mild steel in the roughness range Sa 0.4-5.6 μm. A correlation between absorptance and roughness was noted for stainless steel for Sa values above 1.5 μm.

Place, publisher, year, edition, pages
2006. Vol. 253, no 11, 5017-5028 p.
Keyword [en]
Laser material processing, Absorptance, Steels, Integrating sphere
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:miun:diva-4121DOI: 10.1016/j.apsusc.2006.11.018ISI: 000245500200032Scopus ID: 2-s2.0-33847246442Local ID: 4764OAI: oai:DiVA.org:miun-4121DiVA: diva2:29153
Note

VR-Materials Science

Available from: 2008-09-30 Created: 2009-11-02 Last updated: 2016-10-04Bibliographically approved
In thesis
1. The Absorption of Laser Light by Rough Metal Surfaces
Open this publication in new window or tab >>The Absorption of Laser Light by Rough Metal Surfaces
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Series
Doctoral thesis / Luleå University of Technology, ISSN 1402-1544 ; 2008:08
Keyword
absorptance, reflectance, laser, metals, roughness, integrating sphere
National Category
Materials Engineering
Identifiers
urn:nbn:se:miun:diva-6878 (URN)6064 (Local ID)6064 (Archive number)6064 (OAI)
Public defence
(English)
Available from: 2008-11-03 Created: 2008-11-03 Last updated: 2009-03-10Bibliographically approved

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Citation style
  • apa
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