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Burgers Vector Transition in Fe-Ai-Ni Alloys

Published online by Cambridge University Press:  26 February 2011

D. Keith Patrick ,
Keh-Minn Chang ,
Daniel B. Miracle  and
Harry A. Lipsitt
D. Keith Patrick
Affiliation:
Wright State University, Department of Mechanical and Materials Engineering, Dayton, Ohio 45435 Metcut-Materials Research Group, P.O. Box 33511, Wpafb, Ohio 45433
Keh-Minn Chang
Affiliation:
General Electric Corporate Research and Development Center, Schenectady, New York 12301
Daniel B. Miracle
Affiliation:
Air Force Materials Laboratory, WRDC/MLLM, WPAFB, Ohio 45433
Harry A. Lipsitt
Affiliation:
Wright State University, Department of Mechanical and Materials Engineering, Dayton, Ohio 45435
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Abstract

Polycrystalline NiAl exhibits <001> slip at temperatures below about 450°C. In Fe-Al alloys there is a transition in the Burgers vector from a/2<111> at low temperatures to a<001> at intermediate temperatures. The transition temperature is dependent upon composition.

A transition in the Burgers vector from a/2<111> to a<001> has been found to exist as a function of composition and temperature in the B2 pseudo-binary (Fe,Ni)-40Al (at%) system. At room temperature, this transition occurs at a composition between Fe-40Al-10Ni, which exhibits <111> slip, and Fe-40Al-3ONi, which exhibits <001> slip. At 400°C this transition shifts further toward the iron-rich compositions. Fe-40Al-10Ni exhibits both <111> and <001> slip, whereas Fe-40Al-20Ni exhibits <001> slip.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 267
Copyright
Copyright © Materials Research Society 1991

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References

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