42 Guidance for Selecting Aluminum Filler Materials Avoid the confusion when selecting filler metals for the many different aluminum alloys when gas metal and gas tungsten arc welding — T. Burns and R. Krause 48 Using Games to Drive Engagement in the Classroom “Serious” games can be the stimulus to engage students in the use of technology — J. MCIntosh 52 Choosing an Appropriate Steel Filler Metal for the Base Metal Factors that come into play when selecting filler metals for various carbon steels are explained T. Myers 58 Welding in the Digital Age A professor expounds on the challenges a student who chooses a career as a welding engineer will face T. DebRoy 66 Benefits Gained with LowHydrogen Filler Metals Using low-hydrogen filler metals is one measure to mitigate the risk of cracking when welding low-alloy high-strength steels — D. Railling *70 Achieving Higher Productivity Rates Using Reciprocating Wire Feed Gas Metal Arc Welding A gas metal arc variation that pulses the welding wire in and out of the weld pool controls spatter and heat input — N. Kapustka CONTENTS APRIL 2015 / WELDING JOURNAL 3 42 WELDING RESEARCH SUPPLEMENT 101s Influence of Gas Mixtures in GMAW of Modified 409M Ferritic Stainless Steel Details are given on the effects shielding gas mixtures have on bead geometry, microstructure, and mechanical properties — M. Mukherjee et al. 115s Analytical Modeling of the Friction Stir Welding Process Using Different Pin Profiles An analytic model is developed for heat generation from using different pin configurations V. S. Gadakh et al. 125s Controlling 3D Weld Pool Surface by Adjusting Welding Speed An augmented training system uses a machine algorithm to calculate the optimal welding speed for an untrained welder to follow — Y. K. Liu and Y. M. Zhang 135s Fusion Zone Microstructure and Geometry in CompleteJointPenetration LaserArc Hybrid Welding of LowAlloy Steel Weld geometry and cooling rates with a laser-arc hybrid process were investigated both experimentally and theoretically — H. L. Wei et al. April 2015 • Volume 94 • Number 4 FEATURES 52 66
Welding Journal | April 2015
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