Welding

Description: Devon Gonzales, along with his colleagues at the Colorado School of Mines and Los Alamos National Laboratory, conducted extensive research in order to answer a seemingly simple question: How does interstitial element distribution affect gas tungsten arc welding? Specifically, they were interested in determining how trace amounts of elements like nitrogen, phosphorus, and oxygen affect welding on 304L stainless steel.

Description: Byungchul Kim (Hyundai Heavy Industries) discusses how post-weld heat treatment (PWHT) affects intergranular corrosion in stainless steel weldments. This presentation focuses on 308 and 347 stainless steels, widely used throughout the petrochemical industry as filler metal for weld cladding in hydrotreatment and hydrodesulphurization reactors.

Description: Todd Evans (Vanderbilt University) discusses friction stir welding of additively manufactured aluminum alloys. Recognizing the lack of published information for materials produced using additive manufacturing, Vanderbilt’s Welding Automation Laboratory (VUWAL) and NASA teamed up to research the weldability of various aluminum alloys used in a wide range of aeronautical applications.

Description: Jesse Martinez, on behalf of his colleagues (Dr. P. Burhardt, Dr. C.E. Cross, and A.N. Duffield) at Los Alamos National Laboratory, discusses the results of an experiment that explored the relationship between oxygen and welding arc stability. This experiment was conducted in response to issues the research team encountered with GMA welds on aluminum in low-oxygen environments

Description: M.C. Balmforth (The Materials and Engineering Group, LLC) dives into some of the more technical aspects of shielding gas properties and selection for GTAW. In this presentation, Mr. Balmforth discusses a handful of important arc/plasma properties (thermal conductivity, electrical conductivity, and current), and clears up some common misconceptions regarding what variables determine heat transfer to the weld pool.

Description: This is Part A of a two part video on welding processes typically used in industry and covers the traditional to the very latest welding techniques. Topics include: (1) Production of stick electrodes; (2) Manual metal arc welding; (3) Submerged arc welding; (4) Gas tungsten arc welding (TIG) - manual and automated; (5) Keyhole gas tungsten arc welding; (6) Resistance welding including projection and spot welding; (7) Laser beam welding; & (8) Electron beam welding.

Description: This is Part B of a two part video on welding processes typically used in industry. It shows, with the aid of computer graphics, how the following processes work - their advantages, limitations and typical areas of application of each process: (1) Gas metal arc welding (MIG); (2) Determination of pre-heat; (3) Post heat treatment of welds; (4) Narrow gap welding; (5) Flux cored arc welding - gas and self shielded; (6) Plasma transferred arc welding; (7) Friction stir welding; (8) Oxyacetylene welding; & (9) Thermit welding.

Description: Stephanie Hoffman and Jake Ross explain how veterans can use their skills and experiences from the military to start a successful career in the welding industry.

Description: Explore a career in welding with this brief video introduction.