Milestones
Year 1
- Calculate bulk thermodynamic properties, elastic constants,
lattice parameters, defect concentrations, and interfacial energies
in pure metals and binary alloys from first-principles.
- Assess thermodynamic/kinetic data of critical binary and ternary
alloys and experimentally validate the data.
- Build an efficient 3D phase-field model by implementing the
semi-implicit Fourier-spectral method and incorporating the
elastic inhomogeneity and applied stress effects.
- Test and validate the phase-field model by performing computer
simulations and experimental measurements of microstructure
evolution in Ni-Al binary alloys.
- Process creep test materials and initiate microstructural
characterization.
Year 2
- Develop methods to obtain thermodynamic and defect properties
of ternary alloys from first-principles.
- Extend the phase-field model from binary to ternary systems.
- Build a database for the composition dependence of lattice
parameters and elastic constants in ternary systems.
- Complete the thermodynamic/kinetic database assessment for
ternary/quaternary systems.
- Create an interface between the ternary phase-field model
and the databases.
- Conduct experimental validations of the databases for ternary
systems.
- Complete microstructural characterization of test materials
and initiate creep testing.
Year 3
- Initiate thermodynamic/kinetic database development for commercial
CMSX-10 alloys.
- Extend the phase-field model from ternary to quaternary systems.
- Investigate the relationships among alloy chemistry, microstructure
evolution and coarsening kinetics in model ternary alloys using
the phase-field model.
- Experimentally validate phase equilibria in quaternary systems
and coarsening kinetics in ternary systems.
- Complete mechanical property testing and fractographic analysis
of creep samples and initiate the development of creep model
and probabilistic creep parameter
Year 4
- Complete all database development for CMSX-10.
- Complete the development of a multicomponent phase-field
model
- Simulate microstructure evolution and coarsening in quaternary
systems.
- Complete the development of a probabilistic creep model·
Testing of all the computational tools in commercial CMSX-10
alloys.
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