Additive manufacturing of copper-based alloys for high-temperature aerospace applications: A review
Khashayar Morshed-Behbahani, Ahmed Aliyu, D.P. Bishop, Ali Nasiri
Abstract
The aerospace industry demands high-performance wear- and galling-resistant alloys, which has spurred increased attention on copper-based materials. These materials are promising for high-temperature applications in aeronautics due to their excellent thermal conductivity and satisfactory strength at elevated temperatures, as well as for low-temperature applications, such as bearings and valves. GRCop, GlidCop, and CuCrZr families are the most commonly used alloys in this regard, although the complex shapes and designs of components fabricated using these alloys pose significant fabrication challenges. Recent advances in additive manufacturing technologies, however, have enabled the production of intricate shapes and designs for aerospace components at a reasonable cost and time. This paper reviews the technological advancements in additive manufacturing processes for the production of copper-based alloys in the aerospace industry, including relevant issues related to feedstock materials and post-printing processes. Additionally, this review focuses on the impact of additive manufacturing methods on the properties of the as-built parts, and discusses the certifications and standards for these alloys. Finally, several areas for prospective research studies in this field are suggested.