Prof. Paul Dawson, Cornell University

Developing Principle-Based Approaches to Quantify Mechanical Property Distributions of Titanium Alloys
When May 04, 2016
from 02:00 PM to 03:00 PM
Where LR8
Contact Name
Contact Phone 01865-273925
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A long-standing goal of the materials science and mechanics communities is develop a principle-base approach to estimate an alloy's aggregate properties from knowledge of its microstructural state, the local properties of its constituent phases, and the type of loading being applied. A combination of experimental and modeling capabilities have emerged over the past decade that provide practical tools to reach this goal. From the experimental side, these include electron and x-ray di raction methods for quantifying microstructures of polyphase, polycrystalline alloys and for measuring mechanical behaviors at the scale of individual grains. From the simulation side, these include tools to instantiate virtual samples that adequately replicate measured microstructures and parallel nite element formulations capable of dealing with complex behaviors. In this presentation, I discuss a multi-investigator project with the goal of coordinating these capabilities to estimate distributions of strength and ductility in a two-phase titanium alloy (Ti-6Al-4V) that has been processed to achieve distinctly di erent microstructures. Emphasis is placed on new analytical tools that have been developed to more e ectively integrate
together the data from the di erent sources and to reduce uncertainties in critical input parameters used in simulating the mechanical behavior. In closing, I'll discuss a few challenges that persist and o er interesting opportunities for continued research.