Evaluation of New Titanium Sheet Alloys for Use in Airframe Construction. Volume IV. The Results of Preliminary Investigations of Production Fabrication Methods are Reported in this Volume.
AIR MATERIEL COMMAND WRIGHT-PATTERSON AFB OHIO
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Stretch-wrap tests, springback investigation, and hot-straightening test results were used to modify tooling or processes in the parts fabrication phase. Of the 9 dimpling methods tried on aged Ti-4Al-3Mo-1V alloy, only the Zephyr method using resistance heating of the area to be dimpled was satisfactory. Small conical sections were sucessfully spun in both the annealed and solution-treated condition. Smaller bend radii and less springback were obtained by roll forming than were possible by brake forming. The use of high pressure 10,000 to 35,000 psi offered no advantages in rubber forming Guerin or Marform process. Die-quench forming has potential application for simultaneous forming and heat treating parts which can not be formed in the solution-treated condition.