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The Temperature and Strain Rate Dependence of the Flow Stress of Single Crystal Nial Deformed Along <110>

Published online by Cambridge University Press:  22 February 2011

Stuart A Maloy  and
George T Gray III
Stuart A Maloy
Affiliation:
Los Alamos National Laboratory, MST-5, MS-G755, Los Alamos, NM 87545
George T Gray III
Affiliation:
Los Alamos National Laboratory, MST-5, MS-G755, Los Alamos, NM 87545
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Abstract

Single crystal NiAl and Ni-49.75Al-0.25Fe have been deformed along <110> at temperatures of 77, 298 and 773K and strain rates of 0.001/s, 0.1/s and 2000/s. The flow stress of <110> NiAl is rate and temperature sensitive. A significant decrease in the work hardening rate is observed after deformation at 77K and a strain rate of 2000/s. Coarse {110} slip traces are observed after deformation at a strain rate of 2000/s at 77K, while no slip traces were observed after deformation under all other conditions. TEM observations reveal distinct {110} slip bands after deformation at 77K and a strain rate of 2000/s.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 549
Copyright
Copyright © Materials Research Society 1995

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