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A Study on Post Weld Heat Treatment of Friction Stir Welded Al2195 Blank for Spin Forming

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Abstract:

It is well known that the significant weight reduction and increased strength have placed advanced aluminum-lithium alloys at the forefront of aerospace materials research. For example the use of aluminum-lithium based alloys for rocket fuel tank domes can reduce weight because aluminum-lithium alloys have lower density and higher strength than Al-Cu alloy 2219. However, Al-Li alloys have been shown the inherent low formability characteristic that make them susceptible to cracking during the spinning operations. In this study a novel heat treatment process on the formability of friction stir welded Al-Li alloy blanks are presented. It is shown that the successful heat treatment process has been developed with superior mechanical properties and currently the patent is applied.

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Periodical:

Advanced Materials Research (Volume 1125)

Pages:

190-194

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1125.190

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Online since:

October 2015

Authors:

Jong Hoon Yoon*, Joon Tae Yoo, Kyung Ju Min, Ho Sung Lee

Keywords:

Aluminum-Lithium Alloy, Formability, Friction Stir Welding, Post Weld Heat Treatment, Spin Forming

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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References

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