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1. Apparatus for Accelerating Measurements of Environmentally Assisted Fatigue Crack Growth at Low Frequency
Published: 3/4/2014
Authors: Elizabeth S Drexler, Joseph David McColskey, Marc Dvorak, Neha N. Rustagi, Damian S Lauria, Andrew J Slifka
Abstract: Testing the fatigue crack growth of materials at low frequencies has been a tug-of-war between the investment of time and starting at high values of the stress intensity factor. Running a test at a frequency less than 1 Hz can take weeks and if meani ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912255

2. The effect of Acetobacter sp. and a sulfate-reducing bacterial consortium from ethanol fuel environments on fatigue crack propagation in pipeline and storage tank steels
Published: 2/1/2014
Authors: Jeffrey W Sowards, Charles Hall Davis Williamson, Timothy S Weeks, Joseph David McColskey, John R Spear
Abstract: This study evaluated the effects of microbiologically influenced corrosion (MIC) on fatigue crack growth of candidate materials useful in expanding bioethanol usage including: a storage tank steel (ASTM A36) and two pipeline steels (API 5L X52 and X7 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912439

3. FATIGUE CRACK GROWTH OF TWO PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT
Published: 10/22/2013
Authors: Andrew J Slifka, Elizabeth S Drexler, Nicholas Nanninga, Yaakov Levy, Joseph David McColskey, Robert L Amaro
Abstract: Fatigue crack growth tests were conducted on two pipeline steel alloys, API 5L X52 and X100. Baseline tests were conducted in air, and those results were compared with tests conducted in pressurized hydrogen gas. All tests were run at (load ratio) R ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911967

4. The Influence of Simulated Fuel-Grade Ethanol on Fatigue Crack Propagation in Pipeline and Storage Tank Steels
Published: 10/1/2013
Authors: Jeffrey W Sowards, Timothy S Weeks, Joseph David McColskey
Abstract: This study presents an evaluation of fatigue crack propagation in three steel materials (A36, X52, and X70) in a simulated fuel grade ethanol environment. A fracture mechanics testing approach was used to determine crack propagation rates as a funct ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912385

5. Performance Evaluation of High-Strength Steel Pipelines for High-Pressure Gaseous Hydrogen Transportation
Published: 4/1/2013
Authors: Andrew J Slifka, Elizabeth S Drexler, Robert L Amaro, Joseph David McColskey, Yaoshan Chen, Ming Liu, Yong-Yi Wang
Abstract: 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914096

6. Fatigue Flaw NDE Reference Standard Development - Phase I Feasibility Study
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7902
Published: 11/1/2012
Authors: Mark D. Richards, Joseph David McColskey, Timothy S Weeks
Abstract: 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 whi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910315

7. FATIGUE CRACK GROWTH OF TWO X52 PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT
Published: 9/9/2012
Authors: Andrew J Slifka, Elizabeth S Drexler, Neha N. Rustagi, Damian S Lauria, Joseph David McColskey, Robert L Amaro
Abstract: 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. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912116

8. NIST Overview of Codes and Standards Activities
Published: 8/13/2012
Author: Joseph David McColskey
Abstract: na
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911989

9. EFFECT OF ETHANOL FUEL AND MICROBIOLOGICALLY INFLUENCED CORROSION ON THE FATIGUE CRACK GROWTH BEHAVIOR OF PIPELINE STEELS
Published: 1/25/2012
Authors: Jeffrey W Sowards, Timothy S Weeks, Joseph David McColskey, James R Fekete, Jain Luke, Charles Hall Davis Williamson
Abstract: 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 Midw ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908720

10. Weld Design, Testing, and Assessment Procedures for High Strength Pipelines Curved Wide Plate Tests
Published: 1/25/2012
Authors: Timothy S Weeks, Joseph David McColskey, Mark D. Richards
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909625



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