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31. The NIST Charpy V-Notch Verification Program: Overview and Operating Procedures
NIST Interagency/Internal Report (NISTIR)
Christopher N McCowan, Thomas Allen Siewert, D P Vigliotti
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 ...
32. Intermetallics Formation and Growth at the Interface of Tin-Based Solder Alloys and Copper Substrates
Juan C Madeni, S X Liu, Thomas Allen Siewert
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. ...
33. Application of an On-Line Weld Monitoring System
Thomas Allen Siewert, Ivan Samardzic, Stefanija Klaric
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 ...
34. Estimation of Process Stability in the MAG Welding Process by Monitoring the Welding Parameters
Thomas Allen Siewert
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 ...