Research Areas of the Paden Chair
Some of the more challenging and significant problems in metals processing and life cycle engineering are listed below:
- Wrought polycrystals
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- texture evolution - scale issues and microtextures in single and dual phase alloys (Ni base, Ti alloys, steels, Al alloys, Mg alloys, etc.)
- formation of subgrain dislocation structures - micromechanics and scaling laws
- atomistic modeling of dislocation nucleation and migration in bicrystals and nanocrystals
- heterogeneous models for microstructure scale slip and damage
- continuum interface separation models
- fatigue and fracture following primary processing (influence of orientation, disorientation and grain/phase size distributions)
- strain rate, temperature and deformation history effects
- simulation of metallic polycrystal processing in a high performance computing environment, including simulations of rolling, extrusion, sheet forming, deep drawing, machining which support manufacturing applications
- void nucleation and growth of voids during primary forming
- effects of processing on residual stress and damage at primary nonmetallic inclusions in polycrystals, including subsequent fatigue response
- Cast Metals
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- effects of void nucleation/growth due ot shrinkage and gas porosity, morphology of cast microstructures and other defects on fatigue & fracture
- process/microstructure/property relations for multiple scales of fatigue and fracture
- mechanics of deformation and failure of cellular alloys
- fatigue and fracture of processed joints, with emphasis on weldments (graded bimaterial interfaces)