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Developement of SPF and SPF/DB Techniques for Ti and Al Alloys and their Applications

Published online by Cambridge University Press:  16 February 2011

Ji Wenhai ,
Wang Zhenguo  and
Song Feiling
Ji Wenhai
Affiliation:
Beijing Aeronautical Manufacturing Technology Research Institute, P.O.Box 863, Beijing, China
Wang Zhenguo
Affiliation:
Beijing Aeronautical Manufacturing Technology Research Institute, P.O.Box 863, Beijing, China
Song Feiling
Affiliation:
Beijing Aeronautical Manufacturing Technology Research Institute, P.O.Box 863, Beijing, China
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Abstract

This paper deals with the new development of both SPF of an Al alloy and SPF/DB of an Ti alloy.

Based on a theoretical model, a pressure versus time curve was determined for optimizing the SPF parameters. The effects of applied back pressure and reverse billowing on the performance of 7475 and Al-Cu-Li-Mg-Zr alloys are discussed.

Some essential technological factors which affect the quality of the SPF/DB of the Ti-6A1–4V alloy have been studied, such as the effect of an o layer on the strength of the base metal, the gas filling method and the pre-forming of parts with curved surfaces etc. Examples of applications to the manufacturing of airplane spars and undercarriage doors are also shown in this paper.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 196: Symposium T – Superplasticity in Metals, Ceramics, and Intermetallics , 1990 , 173
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

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