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Materials / Materials characterization

Mechanical properties

Projects/Programs

Keyword

Organizational Unit

NCAL: Tension-Compression Testing

Ongoing

The inability to predict the mechanical behavior of new automotive alloys during forming has generated strong demand in industry for more advanced material models and test methods necessary to calibrate them. Industry is particularly interested in modeling the behavior of advanced sheet metals...

High Impact Ballistic Testing of Polymer Films

Polymer Mechanics

Ongoing

The mechanical behavior for polymers is very sensitive to the deformation rate of the impact test. Thus we are developing and applying several novel measurements that can study the mechanical response of the polymer at different deformation rates and at different material length scales. High-rate...

Schematic of selective transport of water, ions, or molecules across a polymer membrane.

Polymer Membranes

Ongoing

In Situ Sorption Measurements We develop and apply coupled techniques to probe chemical interactions during membrane operation: Quartz Crystal Microbalance (QCM) for mass uptake Polarization Modulation Infrared Reflection Absorption Spectroscopy (PM-IRRAS) for chemical speciation In-situ...

Precursor Material Qualification

Completed

To develop, utilize, and analyze methods of characterizing the precursor materials in additive manufacturing in both virgin and recycled states with the goal of advancing measurement science to benefit the AM community. The components of principal interest will include the rheological, size...

Qualification for AM Feedstocks, Machines and Processes

Completed

Objective - To develop, utilize, and analyze test methods and protocols for characterizing the feedstocks, machines, and processes in metal-based additive manufacturing to enable optimum usage and to reduce the cost and time needed for qualification. What is the Technical Idea? Qualification of AM...

Cross section of a SAC solder joint in a BGA, with sketches of potential micro specimens

Small Scale Mechanical Testing

Ongoing

Knowledge of a material’s mechanical properties is key to designing safe and reliable structural components for applications ranging in size from medical implants to large civil engineering structures. Traditionally, a material’s mechanical properties are measured by performing mechanical tests on...

Strain Tensor Tomography Reconstruction Algorithm

3D Strain Mapping: Transmission Bragg Edge Strain Tensor Tomography (TBESTT)

Ongoing

The techniques available for making predictions of structural component lifetimes are currently limited to 2D. For example, in linear elastic fracture mechanics, the crack tip stress state, used to relate crack growth rates to lifetime, has only been calculated for simple geometries (e.g. compact...

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