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Author: joseph mccolskey
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Displaying records 1 to 10 of 43 records.
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1. 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

2. A Tensile-Testing Technique for Micrometer-Sized Free-Standing Thin Films
Published: 7/1/2005
Authors: Yi-Wen Cheng, David Thomas Read, Joseph David McColskey, J Wright
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851350

3. 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

4. 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

5. 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

6. 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

7. Crack Tip Opening Angle Optical Measurement Methods in Five Pipeline Steels
Published: 10/16/2007
Authors: Philippe P. Darcis, Christopher N McCowan, H. Windhoff, Joseph David McColskey, Thomas Allen Siewert
Abstract: Crack tip opening angle (CTOA) is becoming one of the more widely accepted properties for characterizing fully plastic fracture. In fact, it has been recognized as a measure of the resistance of a material to fracture in cases where there is a large ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50504

8. Crack Tip Opening Angle: Measurement and Modeling of Fracture Resistance in Low and High Strength Pipeline Steels
Published: 9/1/2006
Authors: Philippe P. Darcis, Joseph David McColskey, Christopher N McCowan, Thomas Allen Siewert, Gabriel Kohn, Arry Bussiba, Richard Joel Fields
Abstract: Crack tip opening angle (CTOA) is becoming one of the more widely accepted properties for characterizing fully plastic fracture. In fact, it has been recognized as a measure of the resistance of a material to fracture, in cases where there is a large ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50312

9. Crack tip opening angle measurement through a girth welded in an X100 steel pipeline section
Published: 10/2/2007
Authors: Philippe P. Darcis, Christopher N McCowan, Joseph David McColskey, Richard Joel Fields
Abstract: Crack tip opening angle (CTOA) is becoming one of the accepted methods for characterizing fully plastic fracture. It provides a measure of the resistance to fracture for a material in cases where there is a large degree of stable-tearing crack extens ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50617

10. Crack tip opening angle: applications and developments in the pipeline industry
Published: 7/1/2009
Authors: Elizabeth S Drexler, Philippe Darcis, Richard Joel Fields, Joseph David McColskey, Christopher N McCowan, Roni Reuven, Thomas Allen Siewert
Abstract: One of the most difficult safety problems associated with gas pipeline to be solved is the control of ductile fracture propagation. To address this issue, the crack tip opening angle (CTOA) criterion is becoming one of the more widely accepted proper ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900921



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