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Microstructures and Mechanical Properties of Two-Phase Alloys Based on NbCr2

Published online by Cambridge University Press:  10 February 2011

Katherine C. Chen ,
Paul G. Kotula ,
Carl M. Cady ,
Michael E. Mauro  and
Dan J. Thoma
Katherine C. Chen
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA, kchen@lanl.gov
Paul G. Kotula
Affiliation:
Sandia National Laboratory, Albuquerque, NM 87185
Carl M. Cady
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA, kchen@lanl.gov
Michael E. Mauro
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA, kchen@lanl.gov
Dan J. Thoma
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA, kchen@lanl.gov
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Abstract

A two-phase, NbCrTi alloy (bce + C15 Laves phase) has been developed using several alloy design methodologies. In efforts to understand processing-microstructure-property relationships, different processing routes were employed. The resulting microstructures and mechanical properties are discussed and compared. Plasma arc melted (PAM) samples served to establish baseline, as-cast properties. In addition, a novel processing technique, involving decomposition of a supersaturated and metastable precursor phase during hot isostatic pressing (HIP), was used to produce a refined, equilibrium two-phase microstructure. Quasi-static compression tests as a function of temperature were performed on both alloy types. Different deformation mechanisms were encountered based upon temperature and microstructure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK7.4.1
Copyright
Copyright © Materials Research Society 1999

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References

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