Corrosion and microstructure of an additively manufactured Cu70Ni30 alloy, and feedstock modification to enhance corrosion resistance, strength, and wear resistance
Abstract
Copper-based alloys are commonly used in applications that require high strength and excellent thermal properties, such as heat exchangers that often operate in harsh environments. In some cases, complex geometries are necessary, making additive manufacturing a viable method of production. However, laser-based additive manufacturing of copper presents a significant challenge due to its high thermal conductivity and laser reflectivity. Despite some research on the synthesis, microstructure, and mechanical properties of additively manufactured Cu-based alloys, the corrosion of additively manufactured Cu alloys has not been reported. It is crucial to determine the effect of additive manufacturing on the microstructure, defects, and corrosion behavior of copper-based alloys, such as Cu70Ni30, to ensure their long-term reliability and performance. The main objectives of the proposed research are to additively manufacture a Cu70Ni30 alloy, investigate its microstructure and processing parameters, and study its corrosion properties. The microstructure will be studied using advanced electron and X-ray based techniques, which will help in developing a suitable processing window and understanding the properties. Advanced electrochemical techniques, in combination with state-of-the-art surface characterization techniques, will be used to develop a mechanistic understanding of the corrosion behavior of the additively manufactured Cu70Ni30 alloy. Furthermore, feedstock modification will be carried out to overcome challenges in printing and increase corrosion resistance. The deliverables of the project will be an additively manufactured Cu70Ni30 alloy for marine applications and new knowledge to improve its corrosion and mechanical properties. The project will also have educational and workforce development impacts. Graduate and undergraduate students working on the project will develop hands-on skills in using advanced experimental techniques and gain the ability to work on multidisciplinary projects. Abstract is Approved for Public Release
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 24, 2023
- Source ID
- N000142312674
Entities
People
- Rajeev Gupta
Organizations
- North Carolina State University
- Office of Naval Research
- United States Navy