Title

Assessment of the Compositional Influences on the Toughness of TiCr₂-Base Laves Phase Alloys

Author Info

Katherine C. Chen, Los Alamos National LaboratoryFollow
Samuel M. Allen, Massachusetts Institute of Technology
James D. Livingston, Massachusetts Institute of Technology

Recommended Citation

Published in Materials Research Society Symposium Proceedings, January 1, 1996.

NOTE: At the time of publication, the author Katherine Chen was not yet affiliated with Cal Poly.

Abstract

Systematic studies of alloys based on TiCr, have been performed in order to improve the toughness of Laves phase intermetallics. The extent to which alloy compositions and annealing treatments influence the toughness was quantified by Vickers indentation. The single-phase Laves behavior was first established by studying stoichiometric and nonstoichiometric TiCr,. Next, alloying effects were investigated with ternary Laves phases based on TiCr₂. Different microstructures of two-phase alloys consisting of (Ti,Cr)-bcc+TiCr₂, were also examined. Various toughening theories based on vacancies, site-substitutions, crystal structure (C14, C36, or Cl5) stabilization, and the presence of a second phase were evaluated. The most effective factors improving the toughness of TiCr₂, were determined, and toughening mechanisms are suggested.

Disciplines

Materials Science and Engineering

Copyright

1996, Materials Research Society. All rights Reserved.