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Author: joseph mccolskey

Displaying records 11 to 20 of 43 records.
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11. ADVANCED NON-DESTRUCTIVE HYDROGEN SENSORS TO PREVENT MATERIAL DEGRADATION FROM HYDROGEN DAMAGE
Published: 1/5/2009
Authors: Angelique N Lasseigne, Kamalu Koenig, David Olson, Brajendra Mishra, Joshua Jackson, Thomas Allen Siewert, Joseph David McColskey
Abstract: New higher strength pipeline steels (X100 and X120) exhibit lower tolerance for hydrogen (diffusible and formed hydrides) before significant degradation or failure occurs. It is essential to have advanced sensors to monitor the hydrogen content and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854112

12. CTOA Measurements of Welds in X100 Pipeline Steel
Published: 10/3/2008
Authors: Elizabeth S Drexler, Philippe P. Darcis, Christopher N McCowan, John Matthew Treinen, Avigdor Shtechman, Roni Reuven, Thomas Allen Siewert, Robert Smith, J. Merritt, Joseph David McColskey
Abstract: A suite of tests characterizing X100 pipeline steels was initiated at the National Institute of Standards and Technology (NIST) in Boulder. Part of the test matrix included testing the toughness of the base metal, welds, and heat-affected zones (HAZ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854069

13. Effects of Specimen Geometry on Fatigue-Crack Growth Rates in Pipeline Steels
Published: 9/29/2008
Authors: John Matthew Treinen, Philippe P. Darcis, Joseph David McColskey, R. Smith, J. Merritt
Abstract: In this study, the effect of specimen geometry on the fatigue crack growth rates (FCGR) in API X65 and X100 pipeline steels was explored using the middle tension and compact tension specimen geometries. It was found that the specimen type has little ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854097

14. CTOA Results for X65 and X100 Pipeline Steels:Influence of Displacement Rate
Published: 8/1/2008
Authors: Roni Reuven, Christopher N McCowan, Elizabeth S Drexler, Avigdor Shtechman, Philippe P. Darcis, John Matthew Treinen, R. Smith, J. Merritt, Thomas Allen Siewert, Joseph David McColskey
Abstract: The toughness and plasticity of steel generally decreases with increasing testing rate. The crack tip opening angle (CTOA) was measured on two types of commercial pipeline steels, API-X65 and API-X100 at a range of displacement rates to characterize ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854079

15. Dynamic Apparatus for the CTOA Measurement in Pipeline Steels
Published: 8/1/2008
Authors: Avigdor Shtechman, Christopher N McCowan, Roni Reuven, Elizabeth S Drexler, Philippe P. Darcis, John Matthew Treinen, R. Smith, J. Merritt, Thomas Allen Siewert, Joseph David McColskey
Abstract: When a crack initiates and propagates in a pressurized pipe the only thing that might stop this high-velocity event is the release of internal pressure (decompression) resulting in a deceleration in the crack-propagation rate. This deceleration can b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854082

16. Anisotropic Behavior of X100 Pipeline Steel
Published: 7/6/2008
Authors: John Matthew Treinen, William E Luecke, Joseph David McColskey, Philippe P. Darcis, Yong-Yi Wang
Abstract: While steel is generally treated as being isotropic, tensile and compression tests in the different pipe orientations for API X100 grade pipeline steel show that that this is not the case. To better understand the anisotropy, tests in the longitudina ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853559

17. Peer review report: Pipeline and hazardous materials safety administration, pipeline safety research and development program
Published: 5/14/2008
Authors: Richard Joel Fields, Louis E. Hayden, Thomas J. O'Grady, Joseph David McColskey, Joe C Bowles, T. R. Webb, Christopher N McCowan, Dennis W. Hinnah, Ronald W. Haupt, Thomas Allen Siewert
Abstract: The purpose of this document is to report findings from the research peer reviews held March 27-29, 2007 for PHMSA's Pipeline Safety Research and Development Program. The findings and recommendations in this report derive from the scoring and comment ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50623

18. HYDROGEN PIPELINE RESEARCH AT NIST
Published: 3/31/2008
Authors: Thomas Allen Siewert, Joseph David McColskey, Angelique N Lasseigne
Abstract: In 2007, the National Institute of Standards and Technology greatly expanded its efforts in support of the use of hydrogen as a fuel.   Various NIST divisions have started projects on measurement needs in the areas of flow rates, storage, mater ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853598

19. The role of metallurgy in the NIST investigation of the world trade center towers collapse
Published: 11/1/2007
Authors: Stephen W Banovic, Timothy J Foecke, William E Luecke, Joseph David McColskey, Christopher N McCowan, Thomas Allen Siewert, Frank W Gayle
Abstract: On August 21, 2002, on the direction of the U.S. Congress, the National Institute of Standards and Technology (NIST) initiated an investigation into the collapse of the World Trade Center (WTC) towers. In support of the overall investigation goals, t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900980

20. Fatigue Crack Growth Rates in Pipeline Steels Using Curved M(T) Specimens
Published: 10/23/2007
Authors: Philippe P. Darcis, John Matthew Treinen, Joseph David McColskey
Abstract: This study presents fatigue data for two different ferrite-pearlite pipeline steels. A fatigue crack growth test for full thickness curved pipeline samples was developed using a Middle Tension, M(T), type specimen. Also, FEA (Finite Element Analyses) ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50626



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