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On Phenomenon of Superplasticity in Fe3AL with Large Grains

Published online by Cambridge University Press:  22 February 2011

Aidang Shan  and
Dongliang Lin
Aidang Shan
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
Dongliang Lin
Affiliation:
Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P.R. China
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Abstract

A variety of Fe3Al alloys including Fe-25Al, Fe-28Al, Fe-28Al-4Cr and Fe-28Al-2Ti (all in atomic percent) have been investigated by tensile test to find if these alloys could have superplasticity at elevated temperatures, the results revealed that all these alloys exhibited large elongations when the temperature is higher than 600°C. At 850°C , under appropriate initial strain rate, the elongation is all above 300%. For Fe-28Al-2Ti, the maximum elongation reached 585%. Maximum m values are all above 0.3. Initial grain sizes are bigger than 100μm but became finer after deformation. Fracture happened with necking but no cavities were found under optical microscope. Characteristics of this phenomenon were summarized and discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 115
Copyright
Copyright © Materials Research Society 1995

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References

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