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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 12    
Website: http://www.ijser.org
scirp IJSER >> Volume 2, Issue 12, December 2011
Superplastic hemispherical Bulge Forming of a Ti-Al-Mn Alloy
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Author(s)
B.Yogesha & S. S. Bhattacharya
KEYWORDS
Ti-Al-Mn (OT4-1) alloy, superplastic forming, bulge forming, forming pressure
ABSTRACT
Superplastic sheet thermoforming has been identified as a standard processing route for the production of complex shapes, especially in the aerospace industry. Ti-Al-Mn (OT4-1) alloy is currently being used for aero engine components as well as other aerospace applications by forming through a conventional route which is typically cost, labour and equipment intensive. The Ti-Al-Mn alloy (made as per the Russian specification, OT4-1) is a candidate material for aerospace applications. However, there is virtually little or no information available on its superplastic forming behavior. In this paper the superplastic deformation capability of the Ti-Al-Mn alloy was studied. Sheets of 1 mm thickness were successfully bulge formed to a hemispherical component of 90 mm diameter using a sheet thermoforming route.
References
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5. Boyer, R.B (1996) An overview on the use of tita-nium in the aerospace industry. Materials Science and Engineering, A213, 103-114.

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