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Online Exclusives
  
January 2011 - Aluminum Rises High on a Green Foundation at Greenbuild - The world’s largest conference and expo dedicated to green building, Greenbuild 2010 was held November 17-19 at McCormick Place West in Chicago, IL. Around 28,000 attendees came together at Greenbuild for three days of educational sessions, green building tours, special seminars, and networking events. Greenbuild is managed and organized by the U.S. Green Building Council (USGBC), a national nonprofit organization working to promote buildings that are environmentally responsible, profitable, and healthy to live and work in. The USGBC developed the LEED (Leadership in Energy and Environmental Design) Green Building Rating System, which provides a recognized standard for the building and construction industry in assessment of the environmental sustainability of building designs. Greenbuild showcased the use of aluminum in the form of sheet and extrusions in green buildings, with aluminum’s sustainability being a major topic of discussion at the show. Click here to view article pdf.
 
 
January 2010 – International Temper Designation Systems for Wrought Aluminum Alloys – The globalization of the aluminum industry has made it imperative that universal alloy and temper designations be adopted worldwide. Already, there is an international accord regarding the designation and composition of aluminum and aluminum alloys, published by The Aluminum Association in TEAL SHEETS 2009. However, there still is no international accord on designation and registration of tempers for wrought aluminum and aluminum alloy products, although this is changing slowly but surely. A joint ANSI H35.1, EN 515, and ISO 2107 technical committee on a unified temper designation system has been established and meets periodically. In the meantime, the aluminum industry conducts business worldwide and manages to translate and work with the different temper standards for wrought products established country-by-country. Thus, this two-part article series attempts to summarize the present worldwide status of temper designations and meanings for wrought aluminum and aluminum alloys classified as either strain hardenable (Part 1) or thermally treated (Part 2). In the first article (Part 1), the temper designations for 1xxx, 3xxx, and 5xxx alloys are reviewed with respect to the H temper designations standardized in the U.S. in ANSI H35.1-2009 and European CEN countries in EN 515. In the second article (Part 2), the temper designations for thermally treated – most commonly 2xxx, 6xxx, and 7xxx alloys – are reviewed with respect to T temper designations. At the same time, definitions and comparisons are made between these new and the older temper designations, e.g., outdated German DIN and English BS, wrought aluminum temper designations, and country-specific temper designations that may still be in existence.
  • "Part I - Strain Hardenable (H Temper) Aluminum Alloys," by Joseph C. Benedyk, LMA, October 2009. Click to view pdf.
  • "Part II - Thermally Treated (T Temper) Aluminum Alloys," by Joseph C. Benedyk. Click to view pdf.
 
November 2009 – The Reliability of FEM Codes for Aluminum Extrusion Process Analysis — The International Conference on Extrusion and Benchmark (ICEB) is an event aimed at promoting the most recent advances in aluminum extrusion technologies with a specific session dedicated to the evaluation of the reliability of FEM codes for process analysis. At the 2009 conference, organized in Dortmund in September 2009 (www.iul.eu/extrusion09), there was great interest in the subject of improvement of FEM code capacity for simulation and optimization of the extrusion process. As an exclusive to Light Metal Age, the papers related to FEM code description, as presented by the authors during the conference, are offered here. The papers describe the most recent developments and capabilities of Deform, MTD, and QForm code. Each paper includes details of the main features of the code, the required procedure for model set-up, and the most recent improvement performed in the solving approaches, and in pre- and post-processing interface. Finally, a comparison between FEM code outputs and experimental trials on selected industrial case studies are presented and discussed.
  • "Advancements of Extrusion Simulation in DEFORM-3D," by G. Li, J. Yang, J.Y. Oh, M. Foster, W. Wu, P. Tsai, and W. Chang. Click to view pdf.
  • "Development and Industrial Verification of QForm-Extrusion Program for Simulation of Profile Extrusion," by S. Stebunov, A. Lishnij, N. Biba, S. Bellotti, and P. Bevilacqua. Click to view pdf.
  • "Simulation Aided Extrusion in the Design Practice," by Y. Krähenbühl and B. Bourqui. Click to view pdf.
 
 
August 2009 – Fastener Design Guidelines for Aluminum Extrusion, Sheet, and Plate — As screw fasteners are so often used in aluminum structures, the structural integrity of joints made with these fasteners are highly dependent on proper design guidelines. The Hydro Extrusion Design Manual 2009 and The Aluminum Association’s Aluminum Design Manual 2005 present general design guidelines for mechanical connections. The Hydro Manual includes joining guidelines for longitudinal screw slots and self tapping screws (page 39), and The Association Manual includes guidelines for slip critical bolted connections (Section 5.2.8) and tapping screw connections (Section 5.4). As members of The Aluminum Association Engineering and Design Task Force, responsible for Aluminum Design Manual content, the authors of these two LMA articles have conducted valuable research into pull-out strength of self tapping fasteners in screw slots/screw bosses in various 6063-T5 and 6061-T6 extruded profiles and pull-over failures in 3003, 5005, 5052, 6105, and 6061 sheet and plate. Aluminum extrusions and sheet and plate products figure prominently in the worldwide green building movement. These two articles significantly expand the design guidelines that building and construction engineers can used when assembling aluminum structures.
 
 
April 2009 – Updated ET Paper — Dr. V.I. Johannes and C.W. Jowett’s paper “Temperature Distribution in Aluminum Extrusion Billets” (referenced in "Homogenization of Aluminum Alloy Extrusion Billet, Part III" in the April 2009 issue of LMA) has been updated by Johannes with corrections to the equations that originally appeared in the paper in the Proceedings of the Sixth International Extrusion Technology Seminar (ET ’96). It has been reprinted here with permission from the Aluminum Extruders Council and The Aluminum Association. Click here to view article pdf