Controlled environment superplastic forming of metals

Details Controlled environment superplastic forming of metals Controlled environment superplastic forming of metals

1974-07-08

1976-01-27

Mehr, Milton S.

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72364, 72342, B21D 2604

Patent

active

039344410

ABSTRACT:
Metals such as titanium alloy blanks which are subject to contamination by air at elevated temperatures are precision formed into desired shapes in a controlled environment. The metal worksheet and a shaping member are located within an enclosure. An inert gas environment is provided in the enclosed area. The metal worksheet is heated to a suitable forming temperature and stretched substantially in excess of its original surface area under tensile stress from a fluid pressure loading and formed into the desired shape by interaction with the shaping member. Novel sealing arrangements for the enclosed area of the forming apparatus are provided.

REFERENCES:
patent: 3339387 (1967-09-01), Myers
patent: 3440858 (1969-04-01), Motley et al.
patent: 3535766 (1970-10-01), Hymes
patent: 3572073 (1971-03-01), Dean et al.
patent: 3595060 (1971-07-01), Hundy
patent: 3646653 (1972-03-01), Richard
patent: 3698219 (1972-10-01), Moore et al.

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