Morphology, Deformation, and Defect Structures of TiCr₂ in Ti-Cr Alloys

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

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© 1992, Materials Research Society. All rights Reserved.

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

Abstract

The morphologies and defect structures of TiCr₂ in several Ti-Cr alloys have been examined by optical metallography, x-ray diffraction, and transmission electron microscopy (TEM), in order to explore the room-temperature deformability of the Laves phase TiCr₂. The morphology of the Laves phase was found to be dependent upon alloy composition and annealing temperature. Samples deformed by compression have also been studied using TEM. Comparisons of microstructures before and after deformation suggest an increase in twin, stacking faul4 and dislocation density within the Laves phase, indicating some but not extensive room-temperature deformability.