44 Avoiding HydrogenAssisted Cracking in Welds Know the factors that contribute to hydrogen cracking and how they can be controlled K. A. Lyttle 48 Can Shunting Be Avoided? It is important to understand shunting in resistance welding and how to address it H. Zhang 54 Students and Educators Benefit from Online Training A whole library of online courses is a valuable resource for training the future generation of welders — K. Pacheco CONTENTS 56 Exploring the Need to Include Cast Carbon Steels in Welding Procedure Specifications A case is made to include cast carbon steel grade specifications in AWS D1.1 — D. David et al. *60 Applying Laser Welding to Automobile Airbag Generators Laser welding was investigated for fabricating the shell of an airbag generator — H.Zhang et al. 64 DoubleElectrode Process Speeds GTAW Experiments were conducted with a gas tungsten arc welding variation that uses two electrodes to improve welding speed — M. B. Schwedersky et al. OCTOBER 2015 / WELDING JOURNAL 3 WELDING RESEARCH SUPPLEMENT 313s The Effect of Ar and N2 Shielding Gas on Laser Weld Porosity in Steel, Stainless Steels, and Nickel Experiments were performed to evaluate the influence of nitrogen in the shielding gas for eliminating porosity J. W. Elmer et al. 326s HighSpeed Video of Metal Transfer in Submerged Arc Welding A unique method of capturing images of metal transfer in submerged arc welding was devised to better understand the process — P. F. Mendez et al. 334s Effect of Filler Metal on Mechanical Properties of HSLA Welds Filler metal composition played a significant role in the successful submerged arc welding of high- strength pipe — B. Beidokhti and R. Pouriamanesh October 2015 • Volume 94 • Number 10 FEATURES 56 60 64
Welding Journal | October 2015
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