Process-Structure-Corrosion/SCC Property Study of High Deposition Rate AM 70-30 Cu-Ni
Abstract
70-30 Cu-Ni produced via conventional wrought-processing techniques is a workhorse material that is used in a variety of DoD and commercial applications. The advent of additive manufacturing (AM) provides the opportunity to deposit materials for local repairs as well as build larger volumes depending on the type of AM process (e.g. PBF vs. DED). In particular, the availability of certain Directed Energy Deposition (DED) additive manufacturing wire-fed approaches (e.g. Sciaky, Wire Arc Additive Manufacturing (WAAM)) can provide build rates of 15-20 lbs./hour. This work will conduct a systematic study of WAAM-processed 70-30 Cu-Ni in a variety of build conditions relevant to a number of naval applications where wrought material is typically used, requires repair, or is being considered for use. WAAM processing will be used to prepare bulk and/or thin-wall deposits of different thickness in order to determine theeffects of changes in WAAM process parameters on the resulting microstructure (grain size, phase(s)) and properties (hardness, tension, toughness, fatigue, corrosion/SCC resistance). Test specimens may be excised from the bulk samples in order to provide a directcomparison to thin-wall samples deposited to the same thickness but experiencing different thermal conditions. The extensive experience and existing collaborations of the PI in these areas provides an excellent background to ensure rapid progress on these novel AM processing approaches. The project will support a graduate student, the PI, and laboratory costs to examine the microstructure andmechanical properties/SCC resistance of 70-30 Cu-Ni produced via the WAAM technique, with comparisons to the behavior of laser powder bed fusion-processed 70-30 Cu-Ni being conducted in other ONR-sponsored work.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 08, 2024
- Source ID
- N000142412165
Entities
People
- John J. Lewandowski
Organizations
- Case Western Reserve University
- Office of Naval Research
- United States Navy