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Displaying records 31 to 39.
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31. HYDROGEN PIPELINE RESEARCH AT NIST
Topic: Metals
Published: 3/31/2008
Authors: Thomas A. (Thomas A.) 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

32. Analysis of Welding Parameter Distribution in Stud Arc Welding
Topic: Metals
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50536

33. Fracture Toughness through a Welded Pipeline Section - Crack Tip Opening Angle Criterion
Topic: Metals
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50531

34. Analyzing Microstructure by Rietveld Refinement
Topic: Metals
Published: 6/1/2005
Authors: Davor Balzar, N C Popa
Abstract: Rietveld refinement has a primary purpose of refining crystal structure. However, this powerful technique is being increasingly used for obtaining microstructural information, such as texture, crystallite size, strain and stress, and crystalline defe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50140

35. Residual stress determination by diffraction: Modeling and applications
Topic: Metals
Published: 1/1/2004
Authors: Davor Balzar, N C Popa
Abstract: Residual stress plays an important role in shaping Iilaterials properties. We present both the method to determine texture-weighted strain orientation distribution function for arbitrary crystal and sample symmetries and an example of the determinati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50009

36. The NIST Charpy V-Notch Verification Program: Overview and Operating Procedures
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 1500-9
Topic: Metals
Published: 9/1/2003
Authors: Christopher N McCowan, Thomas A. (Thomas A.) Siewert, D P Vigliotti
Abstract: Charpy impact testing is often specified as ,in acceptance test for structural materials, and companies performing acceptance tests are typically required to verify the performance of their impact machine periodically. The procedure for verifying th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851238

37. Intermetallics Formation and Growth at the Interface of Tin-Based Solder Alloys and Copper Substrates
Topic: Metals
Published: 2/17/2003
Authors: Juan C Madeni, S X Liu, Thomas A. (Thomas A.) Siewert
Abstract: Increasing concerns regarding environmental contamination is driving the soldering research community to develop lead-free solder alloys. Previous studies have shown that Sn-based alloys such as Sn-3.5Ag, Sn-0.7Cu, Sn-9Zn, and Sn-3.2Ag-O. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851327

38. Application of an On-Line Weld Monitoring System
Topic: Metals
Published: 9/12/2002
Authors: Thomas A. (Thomas A.) Siewert, Ivan Samardzic, Stefanija Klaric
Abstract: quisition analysis and real-time manipulation of the welding parameters offer added controls over the weld quality. Thanks to the continual development of information technology and electronics, it is possible to improve the systems for monitoring ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851294

39. Estimation of Process Stability in the MAG Welding Process by Monitoring the Welding Parameters
Topic: Metals
Published: 11/1/2001
Author: Thomas A. (Thomas A.) Siewert
Abstract: This paper presents the distribution of the main welding parameters (welding voltage and welding current) for semiautomatic arc welding with the metal active gas (MAG) process, using both flux- cored and solid electrodes. Two different shielding fas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851229



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