Novel Multi-Functional Hybrid Drawing Process (Area: Material Processes)
Abstract
The technical objective of the proposed effort is to establish a novel multi-functional hybrid drawing process, where induced cavitation energy is used to trigger multiple operations in real-time. The proposed effort is motivated by an opportunity to develop a novel hybrid manufacturing process based on cavitation. The proposed process is comprised of multiple segmented dies that are designed to generate hydrodynamic cavitation at the tool-workpiece interface and enhance metal drawing capabilities. The specific objectives of the proposed research are: to identify the mechanics of hydrodynamic cavitation and accompanied energy release that can be used to trigger other operations in real time; to explore real-time texturing of a sample via hydrodynamic cavitation in a manufacturing process, where the produced micro-texture is instantaneously used to transport lubricant, thus enhancing tribological performance; to conduct a parametric study of the major variables that influence hydrodynamic cavitation, with focus on geometries that induce cavitation, physicochemical properties of fluid, fluid pressure gradient responsible for initiation of cavitation, vapor bubble size and bubble growth; to determine the potential of hydrodynamic cavitation in enhancing surface properties through imploding gas bubbles on the surface of manufactured products; and to explore the potential of altering the chemical characteristics of cavitating fluid, with a particular focus on lubricity, in situ lubricant formulation, and the potential for producing nano-lubricants using shear energy emanating from high velocity micro jets. It is anticipated that this novel process could enable real-time surface texturing via the cavitating fluid, real-time alteration of physicochemical properties of fluid due to local adiabatic temperature rise during bubble implosion, and hydrodynamic Òpseudo shot peeningÓ via cavitation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 22, 2017
- Source ID
- W911NF1610348
Entities
People
- Gracious Ngaile
Organizations
- Army Contracting Command
- North Carolina State University
- United States Army