Influence of surface roughness on morphology of aluminum alloy after pulsed-laser irradiation

Sungho Choi, Chungseok Kim, Kyung Young Jhang, Wan Soon Shin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The objective of this study is to investigate the influence of surface roughness on the morphology of aluminum 6061-T6 alloy after irradiation with a Nd: YAG pulsed laser. The test specimen was prepared by a polishing process using a diamond paste (1 μm) and emery polishing papers (#100, #220, #600, #2400) to obtain different initial surface roughness. After irradiation with ten pulsed-laser shots, the surface morphology was examined by using scanning electron microscopy (SEM), optical microscopy (OM), and atomic force microscopy (AFM). The diameter of the melted zone increased with the surface roughness because the multiple reflections and absorption of the laser beam occurred on the surface because of the surface roughness, so that the absorptance of the laser beam changed. This result was verified using the relative absorptance calculated from the diameter of the melted zone with the surface roughness and the diameter increased with the average surface roughness.

Original languageEnglish
Pages (from-to)1105-1111
Number of pages7
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume35
Issue number9
DOIs
StatePublished - 2011 Sep 1

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Laser beam effects
Pulsed lasers
Aluminum alloys
Surface roughness
Polishing
Laser beams
Irradiation
Optical microscopy
Surface morphology
Atomic force microscopy
Diamonds
Aluminum
Scanning electron microscopy

Keywords

  • Absorptance
  • Average surface roughness
  • Diameter of melted zone
  • Pulsed-laser

Cite this

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Influence of surface roughness on morphology of aluminum alloy after pulsed-laser irradiation. / Choi, Sungho; Kim, Chungseok; Jhang, Kyung Young; Shin, Wan Soon.

In: Transactions of the Korean Society of Mechanical Engineers, A, Vol. 35, No. 9, 01.09.2011, p. 1105-1111.

Research output: Contribution to journalArticle

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