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Room Temperature Tensile Ductility in Polycrystalline B2 NiAl

Published online by Cambridge University Press:  26 February 2011

K. Vedula ,
K. H. Hahn  and
B. Boulogne
K. Vedula
Affiliation:
Associate Professor, Graduate Student and Research Associate, respectively Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106
K. H. Hahn
Affiliation:
Associate Professor, Graduate Student and Research Associate, respectively Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106
B. Boulogne
Affiliation:
Associate Professor, Graduate Student and Research Associate, respectively Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106
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Abstract

Binary polycrystalline alloys of B2 NiAl, ranging from 47 to 51.5 at% Al, were prepared by casting and extrusion. These were tested in tension at temperatures ranging from 300 K to 873 K. Significant tensile ductility is observed in the near-stoichiometric alloy at room temperature as well as at 473 K in spite of the presence of only <100> dislocations. This anomaly appears to be related to the recrystallized texture, to the lower yield strength and to the presence of residual dislocations at grain boundaries in this alloy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 299
Copyright
Copyright © Materials Research Society 1989

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References

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