Pacific Northwest National Laboratory has specialized equipment and staff expertise related to the scalability of shear-assisted processes, such as powder consolidation and direct/indirect extrusion, particularly the industry-relevant scale at which bar, tube, and sheet can be extruded. Extrudates measuring multiple inches in diameter and many feet in length are possible, representing the largest scale capability in the United States for this research area. Material classes studied to date include structural metals (steels, magnesium, and aluminum) and functional materials (magnets and thermoelectrics), where shear-assisted processing has resulted in microstructures with ultra-fine and even nanoscale grain sizes.
The equipment is capable of 200,000 lbs. of axial thrust and 750 ft-lbs. of torque at 1500 rpm. Extrusions having an outer diameter of 3–4 in. can be fabricated with no limitation on length.
Research and development for shear-assisted processing at commercially relevant scales is not found in industry, academia, or other national laboratories.
Use typically is coordinated with capability experts and via collaborative funding proposals or contracts.
Name: Curt Lavender
- Joshi, V., Jana, S., Devaraj, A., Nyberg, E., Lavender, C., “The Processing-Structure-Properties Relationship for Magnesium Alloys during Shear Assisted Indirect Extrusion,” TMS Annual Meeting & Exhibition, Orlando, FL, Mar. 15-19, 2015.
- Catalini, D., Kaoumi, Reynolds, A., Grant, G., “Dispersoid Distribution and Microstructure in Fe-Cr-Al Ferritic Oxide Dispersion-Strengthened Alloy Prepared by Friction Consolidation,” Metallurgical and Materials Transactions A, 46(10), 4730-4739, 2015.
- Whalen, S., Jana, S., Catalini, D., Overman, N., Sharp, J., “Friction Consolidation of n-Type Bismuth-Telluride Thermoelectric Material,” Submitted to Journal of Electronic Materials, Nov. 18, 2015.
- Joshi, V., Jana, S., Young, J., Devaraj, A., Field, D., Whalen, S., Lavender, C., “Shear Assisted Indirect Extrusion of ZK60 Tubing,” Manuscript in Process, 2015.
- Catalini, D., Kaoumi, D., Reynolds, A., Grant, G., “Friction Consolidation of MA956 Powder,” Journal of Nuclear Materials, 442(1), S112-S2118, 2013.