Characterization of Stress Corrosion Cracking Using Laser Ultrasonics [Final Report]

Details

• Creators:
  Klein, Marvin
• Corporate Creators:
  Intelligent Optical Systems, Inc.
• Corporate Contributors:
  United States. Department of Transportation. Pipeline and Hazardous Materials Safety Administration
• Subject/TRT Terms:
  • Cracking
  • Finite differences
  • Lasers
  • Pipelines
  • Stress corrosion
  • Ultrasonics
  • Research Hub
  • Crack depth
  • Laser ultrasonic testing
• Publication/ Report Number:
  1008.3153 DOT-LASSON
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• TRIS Online Accession Number:
  01643089
• Edition:
  Final Report
• Contracting Officer:
  Merritt, James
• Corporate Publisher:
  Intelligent Optical Systems, Inc.
• Abstract:
  This paper focuses on the application of laser ultrasonics to the characterization of stress corrosion cracking (SCC). SCC is the phenomenon in metals wherein the simultaneous presence of tensile stress, a corrosive environment and a susceptible metallurgy leads to the nucleation and propagation of highly irregular and complex cracks, usually found in closely spaced clusters or colonies. In pipelines, SCC has been a particularly elusive and challenging problem. Several pipeline failures around the world have been attributed to SCC since its discovery in pipelines in the 1960s. Laser ultrasonics offers a number of significant benefits for the sizing of SCC cracks, including small footprint on the pipe, rapid scanning and high bandwidth. Laser generation produces a rich admixture of ultrasonic waves, covering many wave types, directions and frequencies. Finite difference modeling offers a very promising pathway to harnessing these waves for effective crack depth measurement.
• Format:
  PDF
• Funding:
  DTPH56-06-T-000003
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/34512/dot_34512_DS1.pdf
• File Type:
  [PDF - 5.74 MB]
• Collection(s):
  PHMSA Collection ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:884ddfa4f2bf58ecfad61639cd80fdbf4e793b2829cbd799fc658123688e1f4d