Development of an Additive Manufacturing Capability for CuNi Seawater HeatExchangers
Abstract
The enormous heat loads of future naval vessels require advanced designs for seawater heat exchangers which may only be achievable b y leveraging the design freedom afforded by Additive Manufacturing (AM). Despite the tremendous advancements in AM, existing modali ties are unable to process CuNi alloys which are chosen for their high thermal conductivity, demonstrated corrosion performance, and biofouling resistance in marine environments. To overcome the challenges of existing approaches, a novel AM capability is proposed for CuNi which uses the unique combination of a bound pellet extrusion process and microwave sintering. Parametric thermodynamic-k inetic models will be assembled to understand the influence of metallic powder starting composition, loading ratios, particle size, and sintering temperature/time on final composition and porosity. Using input from the models, sample coupons will be fabricated, c haracterized and compared to wrought CuNi used in todays heat exchangers.Experimental data will be used to continuously update the models and fabrication approach. At its conclusion, a successful two-year effort will have identified a material processing pathway for CuNi that positions the Navy to begin corrosion studies on advanced AM heat exchanger designs for seawater contact.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 07, 2021
- Source ID
- N000142112796
Entities
People
- Scott Kasen
Organizations
- Office of Naval Research
- United States Navy