The objectives of this project are to understand the plastic flow mechanisms for strengthening and plasticity in micro- and macro-scales in ultrafine microstructures, and to design strategies to increase both strength and ductility of ultrafine-grained Al systems processed by HPT. This project combines expertise in metallurgical research on nanocrystalline materials with advanced characterization methods of measurements by the novel nanoindentation technique and state-of-the-art X-ray and electron diffraction analysis.
The objectives of this project are two objectives. The first being to improve the mechanical properties, such as toughness and tensile strength, of aluminum 2099. The second is to improve the process by which aluminum 2099 undergoes heat-treatment, making it faster and cheaper. This will be accomplished by subjecting samples to severe plastic deformation by HPT.
We would like to express our special thanks to Smiths High Performance who have helped us with the supply of difficult to source metal samples including titanium alloys, for our Advanced Materials Processing and Analysis Laboratory.
The objective of this project is to fully characterize ultrafine-grained titanium aluminide (TiAl) processed by the high-pressure torsion technique. With 20-30 nm grain size, such materials demonstrate very different mechanical properties and plasticity behavior than with conventional microstructures. The extreme high-pressure torsion introduces complexed plastic shear strain. Not only the grain size has been refined, atomic disorder is introduced and large intergranular and residual stresses occur as a function of position within the bulk body. By utilizing Quantum Beam Science, we will perform position resolved maps recording the total scattering in order to evaluate crystallographic phase composition, size-strain broadening, atomic disorder, residual hydrostatic pressure, residual stress, crystallographic texture, orientation correlation and strain partitioning between the two phases by orientation resolved peak intensities, peak positions, peak profile and diffuse scattering.
Manufacture: Moinsys, Korea
Press unit: 100 ton
Function: High-temperature processing unit
Manufacture: TestResources, USA
Function: Tensile testing
Manufacture: Mitutoyo, Japan
Load: 50gf ~ 2 kgf
Function: Auto focus
Manufacture: Pace Technologies