Alloy Development, Processing and Characterization of Devitrified Titanium Base Microcrystalline Alloys.
Annual rept. Sep 83-Aug 84,
NORTHEASTERN UNIV BOSTON MA BARNETT INST OF CHEMICAL ANALYSIS AND MATERIALS SCIENCE
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Principles that govern metastability in rapidly solidified Ti alloys have been investigated with respect to solid solubility and phase transformation. Subsequent heat treatment in ternary Ti alloys results in precipitation reaction between group IIIA or IVA elements and rare earth metals in the absence of Ti. The Ostwald ripening of these binary dispersoids rare earth metals Y, La, Er - Al or Sn compounds has been and is being studied. Characteristics such as transient coarsening behavior and very slow coarsening in these dispersoids were identified. Mechanical properties hardness of alloy ribbon and splat were studied through isochronal and isothermal heat treatment. The alloy ingot was consolidated from alloy flakes by HIPing and is being studied with respect to mechanical properties. Author.
- Properties of Metals and Alloys