Metal treatment – Compositions – Heat treating
Patent
1975-05-12
1976-12-14
Stallard, W.
Metal treatment
Compositions
Heat treating
148 115A, 148 115C, C22F 100, C22F 104, C22F 108
Patent
active
039973697
ABSTRACT:
Alloys having a composition suitable for superplastic deformation usually require heat treatment after casting and mechanical working in order to produce in the alloy the necessary fineness of grain stucture to permit such deformation to occur. It has now been found that some such alloys including in particular ranges of aluminum alloys containing zirconium (or Nb, Ta or Ni) may be heated to a superplastic forming temperature and non-superplastically deformed at that temperature to induce dynamic recrystallisation and simultaneously produce a fine recrystallised grain structure and superplastic deformation.
REFERENCES:
patent: 3529457 (1970-09-01), Butler et al.
patent: 3567524 (1971-03-01), Cook et al.
patent: 3578511 (1971-05-01), Mehl et al.
patent: 3595060 (1971-07-01), Hundy
patent: 3653980 (1972-04-01), Eichelman, Jr.
Gardner Kenneth John
Grimes Roger
Stowell Michael James
Watts Brian Michael
Flocks Karl W.
Stallard W.
T. I. (Group Services) Limited
The British Aluminium Company Limited
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