Cost-Effective Techniques for Weld Property Measurement and Technologies for Improving Weld HE and IGSCC Resistance for Alternative Fuel Pipelines

Built upon proven technologies, this proposal research aims at (i) advancing the general knowledge related to fatigue and fracture properties of pipeline steel welds subject to high pressure hydrogen atmosphere and (ii) developing technologies for weld property improvement. In particular, the project objectives are as follows: (1) Apply Multiple-Notch Tensile and Spiral Notch Torsion Tests for measuring the local tensile strength and fracture toughness of weld region in high-pressure hydrogen. (2) Develop a cost-effective low-frequency cyclic fatigue testing technique for measuring the weld fatigue property in high-pressure hydrogen. (3) Develop the technical basis and database of hydrogen-induced degradation of weld mechanical properties as a function of pressure, temperature and microstructure. (4) Evaluate technologies for improving the HE and IGSCC resistance of steel welds. The technologies include (a) tailoring residual stress by overlay welds, (b) new welding consumables, and (c) friction stir welding.

• Record URL:
  http://primis.phmsa.dot.gov/matrix/prjHome.rdm?prj=323
• Supplemental Notes:
  • Program Information: Pipeline Safety Research, Pipeline Safety

Language

• English

Project

• Status: Active
• Funding: $665211.00
• Contract Numbers:

  DTPH56-10-T-000001

• Sponsor Organizations:

  Pipeline and Hazardous Materials Safety Administration

  U.S. Department of Transportation
  East Building, 2nd Floor 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Project Managers:

  Merritt, James

• Performing Organizations:

  University of Tennessee, Knoxville

  Knoxville, TN  United States 
• Principal Investigators:

  Zhang, Wei

• Start Date: 20100501
• Expected Completion Date: 0
• Actual Completion Date: 20130430
• Source Data: RiP Project 31164

Subject/Index Terms

• TRT Terms: Alternate fuels; Fracture properties; Hydrogen fuels; Pipelines; Residual stress; Welds
• Uncontrolled Terms: High pressure
• Subject Areas: Maintenance and Preservation; Pipelines;

Filing Info

• Accession Number: 01492479
• Record Type: Research project
• Source Agency: Department of Transportation
• Contract Numbers: DTPH56-10-T-000001
• Files: RIP
• Created Date: Sep 10 2013 1:01AM