OnDemand Webinar Series


Presentations: 3


Sessions

Elastic Strain EngineeringElastic Strain Engineering

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Elastic Strain Engineering


Smaller is Stronger. Nanostructured materials such as thin films, nanowires, nanoparticles, bulk nanocomposites and atomic sheets can withstand non-hydrostatic (e.g., tensile or shear) stresses up to a significant fraction of their ideal strength without inelastic relaxation by plasticity or fracture. Large elastic strains, up to ~10%, can be generated by epitaxy or by external loading on small-volume or bulk-scale nanomaterials and can be spatially homogeneous or inhomogeneous. This leads to new possibilities for tuning the physical and chemical properties of a material, such as electronic, optical, magnetic, phononic and catalytic properties, by varying the six-dimensional elastic strain as continuous variables. By controlling the elastic strain field statically or dynamically, a much larger parameter space opens up for optimizing the functional properties of materials, which gives new meaning to Richard Feynman's 1959 statement, "there's plenty of room at the bottom."

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Nanoindentation: Fundamentals and Frontiers


Nanoindentation is a technique that has been broadly applied to characterize the mechanical properties of materials with high spacial resolution. The basic concepts used to accurately apply the technique, as well as some of the newest measurement frontiers being explored today, will be presented in this webinar. The process of converting load versus displacement measurements to materials properties through an understanding of the geometry associated with the experiments is the basis for these experiments. The newest techniques that will be mentioned include in-situ experiments in electron microscopes, testing at elevated temperatures and high-speed testing for the mapping of properties. The challenges associated with these frontiers will be briefly discussed.

Speaker(s):

Mechanical Behavior of Nanocomposites


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