ASSESSMENT OF THE COMPOSITIONAL INFLUENCES ON THE TOUGHNESS OF TiCr,-BAS& LAVES PHASE ALLOYS
نویسندگان
چکیده
Systematic studies of alloys based on TiCr, have been performed in order to impro Ttoughness 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 TiCr,. Different microstructures of two-phase alloys consisting of (Ti,Cr)-bcc+TiCr, 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 TiCr, were determined, and toughening mechanisms are suggested.
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