Quality software management: volume 4: anticipating change

Process for imparting superplasticity to Zn or Zn-Al alloys containing 6-12 percent Cu by warm working an ingot of the metal until substantially the entire cross section has been worked and reduced to a thickness suitable for thermoforming. Stock so prepared can be thereafter formed with the usual superplastic deformation techniques, and resulting manufactures exhibit superior resistance to creep and corrosion and exhibit greater tensile strength.