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Search Publications by: Dave McColskey (Assoc)

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Displaying 26 - 50 of 126

Performance Evaluation of High-Strength Steel Pipelines for High-Pressure Gaseous Hydrogen Transportation

April 1, 2013
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Robert L. Amaro, Joseph D. McColskey, Yaoshan Chen, Ming Liu, Yong-Yi Wang
Pipeline steels suffer significant degradation of their mechanical properties in high-pressure gaseous hydrogen, including their fatigue cracking resistances to cyclic loading. Fatigue crack growth experiments were performed on X52 and X70 steels in both

Fatigue Flaw NDE Reference Standard Development - Phase I Feasibility Study

November 1, 2012
Author(s)
Mark D. Richards, Joseph D. McColskey, Dash Weeks
A feasibility study was performed to evaluate a novel method of accurately fatigue cracking steel plates to generate fatigue proposed fatigue crack reference standards. Fatigue cracks were introduced into low carbon steel reference plates in which the

FATIGUE CRACK GROWTH OF TWO X52 PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT

September 9, 2012
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Neha N. Rustagi, Damian S. Lauria, Joseph D. McColskey, Robert L. Amaro
Fatigue crack growth tests were conducted on two API 5L X52 pipeline steel alloys. One alloy was from a new linepipe that was installed for hydrogen service in 2011. The other alloy was from a vintage pipe that first saw natural gas service in 1964

EFFECT OF ETHANOL FUEL AND MICROBIOLOGICALLY INFLUENCED CORROSION ON THE FATIGUE CRACK GROWTH BEHAVIOR OF PIPELINE STEELS

January 25, 2012
Author(s)
Jeffrey W. Sowards, Timothy S. Weeks, Joseph D. McColskey, James R. Fekete, Jain Luke, Charles H. Williamson
Ethanol fuel production and consumption is expected to increase significantly in the near future. Existing pipeline infrastructure could be repurposed to transport ethanol and other biofuels from production sources, such as those located in the Midwest, to

Ductile-Fracture Resistance in X100 Pipeline Welds Measured with CTOA

December 1, 2011
Author(s)
Elizabeth S. Drexler, Philippe P. Darcis, Christopher N. McCowan, Jeffrey W. Sowards, Joseph D. McColskey, Thomas A. Siewert
A test for evaluation of resistance to ductile fracture (crack tip opening angle, CTOA) was found to reveal changes in crack propagation through the strain and strength gradients near weld joints in X100 pipeline steels. This test provides a long ligament

High-temperature tensile constitutive data and models for structural steels in fire

November 30, 2011
Author(s)
William E. Luecke, Stephen W. Banovic, Joseph D. McColskey
This report documents the stress-strain behavior of a collection of structural steels recovered from the collapse of the World Trade Center. These steels, combined with literature data form the basis of a model for the stress-strain behavior of structural

Fracture of X100 Pipeline Steel: Combined Experimental-Numerical Process

August 26, 2011
Author(s)
Mordechai Szanto, Christopher N. McCowan, Elizabeth S. Drexler, Joseph D. McColskey
Accurate characterization of material fracture properties is necessary for reliable numerical prediction of rupture in gas pipelines. In the current work the ductile fracture properties for high strength X100 pipeline steel, was evaluated, using

United States Capitol Dome:Characterization of Cast and Wrought Materials

January 2, 2011
Author(s)
Christopher N. McCowan, Thomas A. Siewert, David Olson, Joseph D. McColskey
Restoration of the cast iron dome at the United States Capitol is needed because moisture is leaking into interior areas of the building due to corrosion damage. Microstructure, composition, and tensile properties of cast and wrought samples from the dome