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You searched on: Author: thomas siewert

Displaying records 21 to 30 of 76 records.
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21. NIST Workshop on Materials Test Procedures for Hydrogen Pipelines
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6649
Published: 9/1/2007
Authors: Thomas A. (Thomas A.) Siewert, Joseph David McColskey, Richard E Ricker
Abstract: The Materials Reliability and Metallurgy Divisions have expanded their efforts to advance the technology for the construction, repair, and inspection of pipelines. One key factor is to identify and prioritize the research needs of the pipeline co ...

22. Analysis of Welding Parameter Distribution in Stud Arc Welding
Published: 7/15/2007
Authors: Ivan Samardzic, Stefanija Klaric, Thomas A. (Thomas A.) Siewert
Abstract: This paper describes the application of on-line monitoring system for recording welding current and voltage during stud arc welding with a ceramic ferrule. Recorded values of welding current and voltage are analyzed off-line for the weld process wi ...

23. Measurement of Weld Toughness - Crack Tip Opening Angle Criterion
Published: 6/1/2007
Authors: Philippe P. Darcis, Joseph David McColskey, Christopher N McCowan, Thomas A. (Thomas A.) Siewert
Abstract: The stable tearing behavior of X100 pipeline steel through a girth weld section was investigated using a modified double cantilever beam specimens. A test technique for direct measurement of the steady state crack tip opening angle (CTOA) criterion w ...

24. Fracture Toughness through a Welded Pipeline Section - Crack Tip Opening Angle Criterion
Published: 4/23/2007
Authors: Philippe P. Darcis, Christopher N McCowan, Elizabeth S Drexler, Joseph David McColskey, Avigdor Shtechman, Thomas A. (Thomas A.) Siewert
Abstract: The increasing demand for natural gas as an alternative energy source implies continued growth of gas pipeline installations. This trend compels the natural gas transmission industry to consider the construction of larger-diameter, higher-pressure pi ...

Published: 11/16/2006
Authors: Krishna Verma Verma, Thomas A. (Thomas A.) Siewert, F. Beckmann
Abstract: This paper highlights developments that led the FHWA¿s Office of Bridge Technology, working with State departments of transportation (DOT) and the concrete and steel bridge industries, to launch a major initiative to identify available technologies a ...

26. Effect of CVN Striker Radius on Absorbed Energy and Lateral Expansion for Various Stainless Steels
Published: 11/1/2006
Authors: Thomas A. (Thomas A.) Siewert, Betsy Siewert, Raymond L Santoyo
Abstract: A number of wrought and cast stainless steel alloys were used to evaluate the effect of Charpy V-notch striker radius (2 mm vs 8 mm). Standard 10 mm by 10 mm (and 5 mm by 10 mm for N06022) specimens were machined from 5 grades of wrought material (30 ...

27. Evaluation Specimens for Izod Impact Machines (SRM 2115): Report of Analysis
Series: Special Publication (NIST SP)
Report Number: 260-164
Published: 10/1/2006
Authors: Thomas A. (Thomas A.) Siewert, Jolene D Splett, Raymond L Santoyo
Abstract: In the past few years, we have received a number of requests for verification specimens for Izod impact machines, similar to what we offer for Charpy impact machines. Although there are similarities between Izod and Charpy impact testing, there are s ...

28. 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 A. (Thomas A.) 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 ...

29. Fatigue Crack Growth Rates in Five Pipeline Steels
Published: 9/1/2006
Authors: Arry Bussiba, Philippe P. Darcis, J D McCloskey, Christopher N McCowan, Thomas A. (Thomas A.) Siewert, Gabriel Kohn, R P Smith, J. Merritt
Abstract: This study presents fatigue data for six different pipeline steels, with strengths ranging from Grade B to X100. A fatigue crack growth test for full-thickness pipeline samples was developed using a Middle Tension (MT) type specimen. The six steels s ...

30. Second Symposium on Pendulum Impact Machines: Procedures and Specimens
Published: 8/1/2006
Authors: Thomas A. (Thomas A.) Siewert, Christopher N McCowan, M. P. Manahan
Abstract: This publication consists primarily of the papers presented at the Second Symposium on Pendulum Impact Machines: Procedures and Specimens, sponsored by ASTM Committee E28 on Mechanical Testing and its Subcommittee E28.07 on Impact Testing. The Sympos ...

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  • SP 250-XX: Calibration Services
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  • SP 400-XX: Semiconductor Measurement Technology
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  • SP 700-XX: Industrial Measurement Series
  • SP 800-XX: Computer Security Series
  • SP 823-XX: Integrated Services Digital Network Series