This brief web-based resource describes an innovative warm tube hydroforming (THF) system developed by the Center for Precision Forming at the Ohio State University, Applied Engineering Solutions and partners Interlaken Technology Corp. and AddisonMckee Inc. and presents results of using this system on extruded AZ31B and 6061-O tubing. The AZ31B tubes failed at the seams resulting from extrusion through a port hole die and the authors recommend that seamless magnesium tubing be used for hydroforming.

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SOURCE: Aue-u-lan, Y., J. A. Esnaloa, D. Guzza and T. Altan. “Warm Forming Magnesium, Aluminum Tubes – A High Temperature Process for Lightweight Alloys”. TheFabricator.com website, October 3, 2006.