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You searched on: Author: elizabeth drexler Sorted by: date

Displaying records 1 to 10 of 46 records.
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1. Development of an Engineering-Based Hydrogen-Assisted Fatigue Crack Growth Design Methodology for Code Implementation
Published: 7/20/2014
Authors: Robert L Amaro, Elizabeth S Drexler, Andrew J Slifka
Abstract: A primary barrier to the widespread use of gaseous hydrogen as an energy carrier is the creation of a hydrogen-specific transportation network. Research performed at the National Institute of Standards and Technology, in conjunction with the U.S. De ...

2. Summary of an ASME/DOT project on measurements of fatigue crack growth rate of pipeline steels
Published: 7/20/2014
Authors: Andrew J Slifka, Elizabeth S Drexler, Robert L Amaro, Damian S Lauria, Louis E Hayden, Douglas G Stalheim, Yaoshan Chen
Abstract: The National Institute of Standards and Technology has been testing pipeline steels to determine the fatigue crack growth rate in pressurized hydrogen gas; the project was sponsored by the Department of Transportation, and was conducted in close coll ...

3. FCGR of Pipeline Steels in Pressurized Hydrogen Gas: A Comparison of Cyclic Loading Rates
Published: 5/5/2014
Authors: Elizabeth S Drexler, Andrew J Slifka, Robert L Amaro, Damian S Lauria
Abstract: A gaseous hydrogen environment is believed to have a deleterious effect on the fatigue properties of steel. Furthermore, it is theorized that the slower the cyclic loading rate, the greater the rate of crack growth. However, conducting tests at suffi ...

4. Sensitivity Analysis of fatigue Crack growth Model for API Steels in Gaseous Hydrogen
Series: Journal of Research (NIST JRES)
Report Number: 119.002
Published: 3/20/2014
Authors: Neha N. Rustagi, Elizabeth S Drexler, Andrew J Slifka
Abstract: A model to predict fatigue crack growth of API pipeline steels in high pressure gaseous hydrogen has been developed and is presented elsewhere. The model currently has several parameters that must be calibrated for each pipeline steel of interest. ...

5. 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 ...

6. Fatigue crack growth rates of API X70 pipeline steel in a pressurized hydrogen gas environment
Published: 12/21/2013
Authors: Elizabeth S Drexler, Andrew J Slifka, Robert L Amaro, Nicholas Barbosa, Damian S Lauria, Louis E. Hayden, Douglas G Stalheim
Abstract: Hydrogen is known to have a deleterious effect on metal, but pipelines will still be the most cost- effective means of transporting hydrogen gas and sour gas. Rather, it is the codes and standards, such as ASME B31.12, that will guide the design o ...

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 ...

8. Fatigue Crack Growth Modeling of Pipeline Steels in High Pressure Gaseous Hydrogen
Published: 10/21/2013
Authors: Robert L Amaro, Elizabeth S Drexler, Andrew J Slifka
Abstract: Hydrogen will likely play a key role in a future clean energy economy. However, fundamental understanding of the deleterious effects of hydrogen on the fatigue and fracture properties of pipeline steels is lacking. Furthermore, engineering tools fo ...

9. CTOA Testing of Pipeline Steels Using MDCB Specimens
Published: 9/1/2013
Authors: Robert L Amaro, Jeffrey W Sowards, Elizabeth S Drexler, Joseph David McColskey, Christopher N McCowan
Abstract: Crack tip opening angle (CTOA) is used to rank the relative resistance to crack extension of various pipeline steels. In general, the smaller the CTOA value, the lower the resistance to crack extension. It is unclear, however, whether CTOA is a mater ...

10. Modeling the Fatigue Crack Growth of X100 Pipeline Steel in Gaseous Hydrogen
Published: 8/20/2013
Authors: Robert L Amaro, Neha N. Rustagi, Andrew J Slifka, Elizabeth S Drexler, Kip Findley
Abstract: Hydrogen is likely to play a key role (worldwide) in a future clean energy economy. Although pipeline transmission appears to be the most economical means to transport gaseous hydrogen, fundamental understanding of the deleterious effects of hydroge ...

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