Assessment of the compositional influences on the toughness of TiCr{sub 2}-base laves phase alloys
Systematic studies of alloys based on TiCr{sub 2} 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{sub 2}. Next, alloying effects were investigated with ternary Laves phases based on TiCr{sub 2}. Different microstructures of two-phase alloys consisting of (Ti,Cr)-bcc+TiCr{sub 2} were also examined. Various toughening theories based on vacancies, site-substitutions, crystal structure (C14, C36, or C15) stabilization, and the presence of a second phase were evaluated. The most effective factors improving the toughness of TiCr{sub 2} were determined, and toughening mechanisms are suggested.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering; Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- FG02-90ER45426; W-7405-ENG-36
- OSTI ID:
- 444065
- Report Number(s):
- LA-UR--96-4524; ON: DE97003588
- Country of Publication:
- United States
- Language:
- English
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