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Applied Physics A

, Volume 95, Issue 2, pp 447–452 | Cite as

Formation of highly organised, periodic microstructures on steel surfaces upon pulsed laser irradiation

  • Amin AbdolvandEmail author
  • Robert W. Lloyd
  • Marc J. J. Schmidt
  • David J. Whitehead
  • Zhu Liu
  • Lin Li
Article

Abstract

We present results on the growth of highly organised, reproducible, periodic microstructure arrays on a stainless steel substrate using multi-pulsed Nd:YAG (wavelength of 1064 nm, pulse duration of 7 ns, repetition rate of 25 kHz, beam quality factor of M 2∼1.5) laser irradiation in standard atmospheric environment (room temperature and normal pressure) with laser spot diameter of the target being ∼50 μm. The target surface was irradiated at laser fluence of ∼2.2 J/cm2 and intensity of ∼0.31×109 W/cm2, resulting in the controllable generation of arrays of microstructures with average periods ranging from ∼30 to ∼70 μm, depending on the hatching overlap between the consecutive scans. The received tips of the structures were either below or at the level of the original substrate surface, depending on the experimental conditions. The peculiarity of our work is on the utilised approach for scanning the laser beam over the surface. A possible mechanism for the formation of the structures is proposed.

PACS

42.62.-b 81.65.-b 52.38.Mf 81.40.-z 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Amin Abdolvand
    • 1
    Email author
  • Robert W. Lloyd
    • 1
    • 2
  • Marc J. J. Schmidt
    • 1
  • David J. Whitehead
    • 1
  • Zhu Liu
    • 2
  • Lin Li
    • 1
  1. 1.Laser Processing Research Centre, School of Mechanical, Aerospace and Civil EngineeringThe University of ManchesterManchesterUK
  2. 2.Corrosion and Protection Centre, School of MaterialsThe University of ManchesterManchesterUK

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