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Yield Point Phenomenon and Serrated Yielding in Nb-40Ti-15Al

Published online by Cambridge University Press:  15 February 2011

S. Perungulam ,
R. Wheeler ,
D. H. Hou ,
R. J. Grylls ,
S. Banerjee  and
H. L. Fraser
S. Perungulam
Affiliation:
Department of Materials Science and Engineering, The Ohio State University Columbus, OH 43210, USA.
R. Wheeler
Affiliation:
Department of Materials Science and Engineering, The Ohio State University Columbus, OH 43210, USA.
D. H. Hou
Affiliation:
Micron Technology Inc, Boise, Idaho, USA.
R. J. Grylls
Affiliation:
Department of Materials Science and Engineering, The Ohio State University Columbus, OH 43210, USA.
S. Banerjee
Affiliation:
Materials Group, Bhabha Atomic Research Centre, Bombay, INDIA.
H. L. Fraser
Affiliation:
Department of Materials Science and Engineering, The Ohio State University Columbus, OH 43210, USA.
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Abstract

The ternary Nb-40Ti-15Al (at%) intermetaltic has an ordered B2-type crystal structure and shows appreciable ductility. Deformation is mainly accommodated in slip bands by the glide of b=l/2<lll> dislocations on {110} planes. The tensile behavior of this material has been studied at room temperature and at intermediate temperatures. Static and dynamic strain aging have been observed in certain temperature regimes. A model based on dislocation pinning by precipitates is proposed to explain the serrations observed during dynamic strain aging.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 653
Copyright
Copyright © Materials Research Society 1997

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References

1. Menon, E.S.K., Subramanian, P.R. and Dimiduk, D.K., Met and Mater. Trans. 27A, 1647 (1996).CrossRefGoogle Scholar
2. Hou, D.H. and Fraser, H.L., Scripta Met (1996), in the press.Google Scholar
3. Shyue, J., Hou, D.H., Aindow, M. and Fraser, H.L., Mater. Sci. and Eng., A 170, 1(1993).CrossRefGoogle Scholar
4. Banerjee, S. and Naik, U.M., Met and Mater. Trans(1996).Google Scholar
5. Wheeler, R., Perungulam, S., Hou, D.H. and Fraser, H.L., Proceedings of TMS,(1996).Google Scholar
6. Popille, F., Kubin, L.P., Douin, J. and Naka, S., Scripta Met 34, 977(1996).CrossRefGoogle Scholar
7. Lerf, R. and Morris, D.G., Acta Met 42, 1091(1994).CrossRefGoogle Scholar

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