Departments Editorial ............................4 Washington Watchword ..........6 Press Time News ..................8 News of the Industry ............10 Letters to the Editor ............22 Aluminum Q&A ..................24 Brazing Q&A ......................26 Product & Print Spotlight ......28 Brazing & Soldering Today Technology News ..............56 Coming Events....................64 Certification Schedule ..........68 Welding Workbook ..............70 Society News ....................73 Tech Topics ......................81 Interpretations C3.7, D1.5 ..81 Erratum A5.1 ..................81 Amendment Notice D14.3 ....81 Guide to AWS Services ........95 Personnel ........................96 Classifieds ......................106 Advertiser Index ................108 WELDING JOURNAL 3 CONTENTS Features 34 Tips for Selecting a Positioner Choosing the right positioner for the application requires many considerations C. White Business Briefs 38 Profile: John Stropki An executive with a 41-year career shares his views on the welding industry and its future 42 What Can a Welding Positioner Do for You? Different types of positioners offer various benefits D. Heinrich II Welding Journal (ISSN 0043-2296) is published monthly by the American Welding Society for $120.00 per year in the United States and possessions, $160 per year in foreign countries: $7.50 per single issue for domestic AWS members and $10.00 per single issue for nonmembers and $14.00 single issue for international. American Welding Society is located at 8669 NW 36th St., # 130, Miami, FL 33166-6672; telephone (305) 443-9353. Periodicals postage paid in Miami, Fla., and additional mailing offices. POSTMASTER: Send address changes to Welding Journal, 8669 NW 36th St., # 130, Miami, FL 33166-6672. Canada Post: Publications Mail Agreement #40612608 Canada Returns to be sent to Bleuchip International, P.O. Box 25542, London, ON N6C 6B2, Canada. Readers of Welding Journal may make copies of articles for personal, archival, educational or research purposes, and which are not for sale or resale. Permission is granted to quote from articles, provided customary acknowledgment of authors and sources is made. Starred (*) items excluded from copyright. Brazing & Soldering Today 44 Selecting Materials for Brazing a Honeycomb in Turbine Engines A gas turbine engine requires tight tolerances and proper brazing procedures to seal against leakage D. Sporer and D. Fortuna *50 What Matters Most in Vacuum Aluminum Brazing Learn the process fundamentals and characteristics for success C. Moller and J. Grann Welding Research Supplement 31-s Welding of Nickel-Based Alloys for Energy Applications An in-depth look at years of research is provided in this 2013 Adams Lecture J. N. DuPont 46-s Skilled Human Welder Intelligence Modeling and Control: Part 1 — Modeling The skills of an experienced welder were used as the foundation for a model to predict fluctuations in the weld pool during gas tungsten arc welding Y. K. Liu et al. 53-s Solidification of GTA Aluminum Weld Metal: Part I — Grain Morphology Dependent upon Alloy Composition and Grain Refiner Content The influence of grain refiners and welding speed were studied as a means of reducing solidification cracking P. Schempp et al. 60-s Diffusion Brazing Metallurgy of IN718/ Ni-Cr-Si-B-Fe/IN718 An investigation was conducted on the effect of microstructure development on the mechanical properties of a nickel-based superalloy M. Pouranvari et al. 34 42 50 February 2014 • Volume 93 • Number 2 AWS website www.aws.org On the cover: Buzz Noel, a welder/assembler at Koike Aronson, Inc./Ransome, Arcade, N.Y., performs gas metal arc welding on the top of an HD500, a nearly 15,000-lb welding positioner held by a 25-ton crane.
Welding Journal | February 2014
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