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The Charpy Impact Behavior of Fe3Al and Fe3Al-20 at % Mn Alloys

Published online by Cambridge University Press:  15 February 2011

J. N. Liu ,
W. Yan ,
J. L. Ma  and
K. H. Wu
J. N. Liu
Affiliation:
Department of Materials Engineering, Xian Institute of Technology, P. R. China
W. Yan
Affiliation:
Department of Materials Engineering, Xian Institute of Technology, P. R. China
J. L. Ma
Affiliation:
Department of Mechanical Engineering, Florida International University, Miami, FL 33199, USA
K. H. Wu
Affiliation:
Department of Mechanical Engineering, Florida International University, Miami, FL 33199, USA
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Abstract

A series of experiments were conducted to investigate the impact fracture behavior of Fe3Al and Fe3Al-20 Mn alloys. The results of this study indicated that: (i) The addition of Mn introduces an ordered Ll2-type phase in the Fe3Al-based alloys. On the other hand, the addition of Mn decreases the order parameter of the DO3 a phase, (ii) The total- impact energy of an Fe3Al alloy increases with the temperature at the low-temperature range (<600°C), then drops around 700°C, and finally increases again as the temperature further elevates, (iii) The trend of the variation of the impact energy of Fe3Al-20 at % Mn alloy with temperature is the same as that of the Fe3Al alloy, (iv) And the addition of Mn significantly improves the impact energy of the Fe3Al-based alloy, and changes the variation of the crack-growth energy with the testing temperature when the temperature is above 700°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 343
Copyright
Copyright © Materials Research Society 1997

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References

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