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The Phenomenon of Superplasticity in Feal-Ti Alloy with Large Grains

Published online by Cambridge University Press:  22 February 2011

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

The phenomenon of superplasticity in an ordered FeAl based alloy is reported in this paper for the first time. The behavior of superplastic deformation for the FeAl based alloy (Fe-36.5at.%-2at.%Ti) with large grains of above 300 μm has been examined at 1000°C in a strain rate range from 1.39×10− 4 /s to 2.78×l0−2 /s. The maximum elongation of 208% for the FeAl based alloy with large grains has been obtained and the index of strain rate sensitivity, the m value, has a range of values from 0.25 to 0.42. The reason for the large elongation is ascribed to the dynamic recovery and recrystallization during deformation in this large grained alloy at high temperatures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 225
Copyright
Copyright © Materials Research Society 1995

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