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Room Temperature Deformation in “Soft” Orientation Nial Single Crystals

Published online by Cambridge University Press:  26 February 2011

R.D. Field ,
D.F. Lahrman  and
R. Darolia
R.D. Field
Affiliation:
Engineering Materials Technology Laboratories, Ge Aircraft Engines1 Neumann Way, Cincinnati, OH, 45215
D.F. Lahrman
Affiliation:
Engineering Materials Technology Laboratories, Ge Aircraft Engines1 Neumann Way, Cincinnati, OH, 45215
R. Darolia
Affiliation:
Engineering Materials Technology Laboratories, Ge Aircraft Engines1 Neumann Way, Cincinnati, OH, 45215
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Abstract

A detailed study of deformation of NiAl single crystals in two soft orientations, <110> and <111>, has been conducted. The Schmid factor favors {100} slip in the former and {110} slip in the latter. Detailed dislocation analysis, critical resolved shear stress measurements, and slip trace analysis have been performed to determine the nature of dislocation motion and interactions in this material. Particular attention is given to prismatic loops formed during deformation, since the shapes of these loops reveal the active slip planes. Similar loop morphologies observed in elevated temperature [001] oriented tensile specimens are also discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 255
Copyright
Copyright © Materials Research Society 1991

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References

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