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SUMMARY:Investigation of Residual Stress and Mechanical Properties of Stee
 lwork After Laser Cleaning
DTSTART;VALUE=DATE-TIME:20211125T075200Z
DTEND;VALUE=DATE-TIME:20211125T075300Z
DTSTAMP;VALUE=DATE-TIME:20260306T084921Z
UID:indico-contribution-4387@events01.synchrotron.org.au
DESCRIPTION:Speakers: Yutaka Tsumura (Sydney University)\nSurface preparat
 ion of steelwork for structural repainting is often conducted by sandblast
 ing method in which abrasives (sands) are blasted onto the painted surface
  at high speed\, removing the old paint and rust/dirt by the impact of the
  blast. This conventional method would cause irreversible damage to the un
 derlying substrate\, deteriorating its mechanical and fatigue performance.
  Laser cleaning has attracted attention as an alternative to conventional 
 cleaning methods as an environmentally friendly and economical technology 
 that removes paint and corrosion efficiently while inducing minimal damage
  to the surface of the material. \nThis research investigates the mechanic
 al properties and residual stresses of the laser cleaned steel samples fro
 m the Sydney Harbour Bridge. Laser cleaning using nanosecond laser was per
 formed on the structural steel plates removed from the Sydney Harbour Brid
 ge. The plates were then tested at the Australian Nuclear Science and Tech
 nology Organisation (ANSTO) for residual stress measurement and the Univer
 sity of Sydney for the microstructure characterisation and microhardness t
 esting. \nResults of the residual stress measurements indicated that the r
 esidual stress profile changes at the surface after cleaning. This study e
 nhances the understanding of changes in residual stress and mechanical pro
 perties at the surface of a steel subjected to laser cleaning.\n\nhttps://
 events01.synchrotron.org.au/event/146/contributions/4387/
LOCATION:Online
URL:https://events01.synchrotron.org.au/event/146/contributions/4387/
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