Materials Process Design and Control Laboratory, Cornell University

1. AFOSR Grant Number: F49620-00-1-0373PI: Prof. Nicholas Zabaras Institution: Cornell UniversityTitle: Advanced computational techniques for the design of multi-stage deformation processses Single stage process preform design Rigid die Forging rate Micro- structure evolution Flash Unfilled die cavity Evolution of porosity Multi stage process design Preforming stage Finishing stage Materials Process Design and Control Laboratory, Cornell University

2. Towards multi-length scale process design - A feasibility study for the control of microstructure-sensitive properties Control of texture in FCC Copper • Recent developments: • Feasibility of multi-length scale design at a material point. • Applications of proper orthogonal decomposition techniques towards microstructural model reduction. Texture represented here as a density field over the space of all possible orientations of crystals (Rodrigues parametrization) Desired ODF ODF from initial guess • Potential impact: • Moving from phenomenology to polycrystalline plasticity – use of first principles towards the design of microstructure sensitive properties. • Ability to tune microstructure for desired properties. ODF at an intermediate step ODF from optimum solution Grain growth by variational or statistical methods Polycrystal plasticity Control of Elastic Modulus in FCC Copper Statistical averaging Grain distribution in the polycrystal Microstructure-sensitive properties evaluated through statistical averaging at a material point Materials Process Design and Control Laboratory, Cornell University