Extending the life of existing nuclear power plants means verifying alloy strength decades of radiation exposure. The quantity of exposed material is limited. Testing small-scale samples enables statistically relevant studies when available material is limited. It also means less radioactive material in the lab.
The µTS combined with microscopy can be used to study inter-grain interaction in metals. Digital image correlation enables effective surface strain field mapping and optical microscopes offer a convenient, cost effective image capture technique.
Digital Image Correlation and optical microscopy enable local strain measurement on tissues, cells and cellular structures. Psylotech offers a temperature control chamber and a fluid bath to control a sample’s environment. Ask us how we can help develop gripping techniques for your specific application.
Leveraging small scale, the µTS miniature universal load frame can test samples cut through the thickness of a weld. Complete stress strain curves can be obtained from different sections, providing direct correlation of yield and failure strength as a function of weld depth.
Interactions between grains and voids during mechanical loading can be studied with the µTS. For example, consider toughening mechanisms in partially stabilzed zirconia. Correlation coefficient can track microcrack formation and DIC can reveal localized strain changes from the partially stabilized phase closing the crack tip.
The Materials Genome Project is a guiding principle for government research and grants on par with the National Nanotechnology Initiative. Understanding materials on multiple length scales is a key part of this effort. Substantial work is done on the theoretical and numerical implications of length scale dependence. Psylotech’s µTS is an ideal experimental tool for experimental validation on these length scales.
In recent years, there has been a movement to build macroscopic composite mechanical properties from matrix and reinforcement micromechanics models. The µTS enables experimental validation of such multi-scale simulation. A reliable, experimentally validated micromechanics model can generate material properties for any fiber orientation and any loading directions.
The µTS is also appropriate for measuring single fiber stress-strain curves as well as fiber pull-out strength. Ask us how we can help you determine these properties.
Multi-scale µTS testing can provide critical insight into any metal process where properties vary through the thickness, such as casting, welding or heat treating. Small dogbone samples can be wire edm’ed from any orientation within the part, providing highly localized stress-strain data.
The µTS is also a powerful tool for composite materials, enabling the study of particle-matrix interaction on small length scales. These data can be combined with new simulation techniques to infer macro-scale material properties from micromechanics interactions between reinforcing particle and matrix. Through simulation, composites can be optimized virtually, accelerating the product development process.
Small scale local strain field measurements on the interlocking fibers in paper goods can reveal A better understanding of the mechanisms and structures that strengthen the material can lead to improved products which use less raw material. Improving properties would have economic and environmental implications.
Indeed, the µTS was first developed as a versatile small-scale load frame in an Army Research Laboratory SBIR. (link to about). Meso-scale simulation validation has numerous military implications. For example, consider a Kevlar flack jacket. The µTS can provide data on the fiber strength, fiber/matrix interaction, soft tissue and bone. As such, the impact event can be simulated and the bullet proof vest can be optimized virtually.