|Monday, March 31, 2014 @ 12:00 pm EDT — Monday, March 31, 2014 @ 1:00 pm EDT|
Dr. Dennis M. Dimiduk
Air Force Research Laboratory, Materials and Manufacturing Directorate
Wright-Patterson Air Force Base
INTEGRATING MATERIALS AND STRUCTURES PERFORMANCE PREDICTION VIA THE MATERIALS GENOME INITIATIVE
Materials and structures design can now access a remarkable set of new materials modeling and simulation tools. The capabilities of such tools are expanding rapidly for representing mechanisms important to both ‘design with’ and ‘design of’ materials at disparate scales. The present talk examines advances in the multiscaleaspects of mechanical behavior simulation for the purposes of predicting materials performance for an engineering design system. Selected tools and techniques are discussed from a viewpoint motivated by two questions: i) what multiscaletools and methods are able to provide predictive capabilities and, ii) how might the methods be incorporated into an integrated computational materials engineering framework to reduce the need for empirical data? The initial conclusion is that microstructure-level tools are significantly underdeveloped and are likely to remain so for some time; thus, a more structured approach to integrated computational and empirical methods is necessary that considers appropriate selections of both ‘top down’ and ‘bottom-up’ approaches.
Dennis M. Dimidukis a Laboratory Fellow and past Technical Director of the Structural Materials Division at the Air Force Research Laboratory, Materials and Manufacturing Directorate. Through the early 1980's he performed metallurgical research on alloy development, phase transformations and strengthening mechanisms in high-temperature superalloys. At that time, Dr. Dimidukled the intermetallicsresearch area for the Air Force, conducting in-house research and motivating research at other laboratories and universities. Throughout the 1990’s, work by he and his colleagues on titanium aluminidesand refractory intermetallicsopened an approach toward raising the use temperatures and realizing weight reductions in advanced engines. Their early research foundation led to current introductions of titanium aluminidesinto commercial turbine engines. In 1989, Dr. Dimidukcontributed to and led research seeking to understand the influence of chemistry on microstructural evolution and deformation in alloys through computer simulation. The group’s early involvement in computational materials science and materials simulations led directly to the community’s current and growing activities in Integrated Computational Materials Science & Engineering (ICMSE) and the MGI. That research also led to advancements in the 3d characterization of materials, new techniques for mechanical property characterization at the micrometer scale and, to the discovery of a new regime of size-affected metal deformation behavior. Dimidukcontinues to pursue and explore those advancements today.
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