Alloy development, processing and characterization of devitrified titanium-base microcrystalline alloys. Annual report, September 1984-August 1985
Technical Report
·
OSTI ID:7195612
The effect of rapid solidification on solid solubility, microstructural refinement, and phase transformation in binary and ternary titanium alloys was studied. The stability of the refined microstructures produced by rapid quenching were investigated under the isothermal and isochronal conditions. In particular, Ostwald ripening of rare earth (Y, La, Er) and thorium dispersoids in Ti-Sn-X (Y, La, Er, Th) systems at elevated temperatures (700-900 C, phase) was investigated by transmission electron microscopy and image analyzer. The grain growth rate at the presence of the rare earth and Th dispersoids was investigated and determined as a function of time. The deterioration of microhardness in the ternary alloys containing rare earth dispersions upon high-temperature annealing was studied in relation to microstructural coarsening.
- Research Organization:
- Northeastern Univ., Boston, MA (USA). Barnett Inst. of Chemical Analysis and Materials Science
- OSTI ID:
- 7195612
- Report Number(s):
- AD-A-172140/6/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
ACTINIDE ALLOYS
ALLOYS
ANNEALING
CRYSTAL STRUCTURE
DISPERSIONS
HARDNESS
HEAT TREATMENTS
HIGH TEMPERATURE
ISOTHERMS
MECHANICAL PROPERTIES
MICROHARDNESS
MICROSTRUCTURE
PHASE TRANSFORMATIONS
QUENCHING
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
SOLIDIFICATION
SOLUBILITY
STABILITY
THORIUM ADDITIONS
THORIUM ALLOYS
TIME DEPENDENCE
TIN ALLOYS
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
VERY HIGH TEMPERATURE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
ACTINIDE ALLOYS
ALLOYS
ANNEALING
CRYSTAL STRUCTURE
DISPERSIONS
HARDNESS
HEAT TREATMENTS
HIGH TEMPERATURE
ISOTHERMS
MECHANICAL PROPERTIES
MICROHARDNESS
MICROSTRUCTURE
PHASE TRANSFORMATIONS
QUENCHING
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
SOLIDIFICATION
SOLUBILITY
STABILITY
THORIUM ADDITIONS
THORIUM ALLOYS
TIME DEPENDENCE
TIN ALLOYS
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
VERY HIGH TEMPERATURE