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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

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