Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Interaction mechanisms of pulsed laser beams at different wavelengths with matter
Luleå tekniska universitet.
2004 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis presents an investigation of the interaction mechanism involved in processing of different engineering materials using pulsed TEA CO2- and Nd:YAG lasers. Several methods were used. Digital Speckle Photography (DSP) or Speckle Correlation was used to detect micro-structural changes in the material surface during laser irradiation. Scanning Electron Microscopy (SEM) and optical microscopy were used to obtain information about hole quality; entrance and exit diameters, amount of spatter, cracking etc., when laser drilling. Optimum processing parameters, for example wavelength, pulse repetition frequency and pulse energy were established and are presented in this thesis. In Papers A and B, an evaluation of the interaction mechanism using Digital Speckle Photography (DSP) is presented. Paper C focuses more on the influence of the laser irradiation parameters on the quality of laser drilled holes. To find optimum processing parameters, SEM and optical microscopic investigations of thermoplastic polymers, and thermoset polymers exposed to laser irradiation with different wavelengths were carried out. Thermoplastics PMMA and Polycarbonate and a thermoset epoxy matrix reinforced by glass and graphite fibres were used. The results from the first paper showed that microstructural changes caused by laser pulse impact can be visualised. The results of other two papers showed that, for hole drilling, short wavelengths are most suitable since these give good hole quality in most engineering materials including metals and composites.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2004. , 22 p.
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757 ; 2004:29
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-26183Local ID: d1086bb0-aee7-11db-803d-000ea68e967bOAI: oai:DiVA.org:ltu-26183DiVA: diva2:999342
Note
Godkänd; 2004; 20070128 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

Open Access in DiVA

fulltext(29388 kB)33 downloads
File information
File name FULLTEXT01.pdfFile size 29388 kBChecksum SHA-512
823951cb53632e0fa5f3beac1a978db27082cbc6c88ba2cc8212f40d131d1b3364d6b140f241c4c33eb3dd93b1ff7455bc0cb374b979e5c06a8b2c4589a21f79
Type fulltextMimetype application/pdf

Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 33 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 52 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf