ICME Workflows for Rapid Exploration of Process-Structure-Property Relations for Fatigue Critical Metallic Components
Abstract
Integrated Computational Materials Engineering (ICME) is a bold, transformative initiativethat offers promise to reduce time and cost in materials development and tailoring for specificapplication requirements by fusing computational modeling and simulation with experiments viaa multilevel decision support strategy. This three-year research program aims to pursuedevelopment and instantiation of such a multilevel strategy using an inductive design explorationframework in which process-structure and structure-property relations are decomposed for bothalpha-beta Ti alloys and 7000 series Al alloys for naval aviation applications, with an emphasis onfatigue-critical applications. Decision support will incorporate an information economicsapproach based on a value of information metric that balances computational and experimentaleffort with cost to maximize utility of information in providing decisions. Process-structuremappings will be based on available literature for these materials, including uncertainty estimates.With a focus on digital representation of microstructure, process-structure relations will be basedon microstructure-sensitive computational fatigue modeling using crystal plasticity, addressingsensitivity to microstructure resulting from process path including both intrinsic (grain/phase size,shape and orientation distributions) and extrinsic (residual stresses, surface roughness, nonmetallicinclusions and pores) features. A robust methodology for decision support will be pursued formultilevel materials development, addressing a ranged set of performance requirements. Extremevalue (minimum property) fatigue will be the primary performance requirement, with secondaryrequirements associated with other properties. The resulting framework will be validated bycomparing target estimates of desired microstructures for a range of alpha-beta Ti and 7000 seriesAl alloy microstructures from this ICME-enabled framework with experimental observationsregarding fatigue resistance, after exercising the framework for Ti-64 and 7075-T6 Al. Theproposed work is novel and stems from foundations established by the proposer and collaboratorsover the past decade that integrate materials science, computational mechanics, systems design,and ICME. The proposed research will have potential for broader impact on new material systemsand process routes relevant to naval applications that are particularly prone to fatigue criticality,including depot repair and additive manufacturing.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 04, 2017
- Source ID
- N000141712036
Entities
People
- David Mcdowell
Organizations
- Georgia Tech Research Corporation
- Office of Naval Research
- United States Navy