Elmet Technologies released new research in the International Journal of Refractory Metals and Hard Materials. The study examines post-processing techniques’ impact on the tensile properties of additively manufactured niobium-based C103 refractory alloy.

The research, titled “Tensile properties of R512E coated NbC103 manufactured using laser powder bed fusion,” evaluates the mechanical properties of C103 alloy with an R512E coating. It compares various post-processing methods. These include Hot Isostatic Pressing (HIP) and two heat treatment procedures.

The study provides insights into optimizing the mechanical performance of additively manufactured refractory alloys. These alloys are crucial for high-temperature applications. The research highlights the significance of post-processing in achieving desired tensile properties.

Elmet Technologies’ findings contribute to the understanding of additive manufacturing for advanced materials. This knowledge is vital for industries requiring high-performance components.

Post-Processing and Tensile Testing of C103 Alloy

Elmet Technologies recent research explores the impact of post-processing on C103 alloy, a material vital in aerospace for its high-temperature resistance. C103 often receives an R512E environmental barrier coating to enhance durability. This coating is a disilicide slurry applied and cured with heat.  

For this study, Elmet utilized spherical C103 powder from HC Starck Solutions, produced via Electrode Induction Gas Atomisation (EIGA). Researchers rigorously analyzed the powder’s size and composition. This ensured material consistency. Specimens were then manufactured using a Renishaw AM400 metal Additive Manufacturing machine. Various post-processing methods simulated operational conditions.  

The study revealed as-additively manufactured C103 met ASTM standards for wrought material regarding strength and elongation. However, Hot Isostatic Pressing (HIP) led to grain growth. This reduced strength, although it remained above wrought C103 minimums. Applying the R512E coating and heat treatment further increased grain growth. Consequently, the strength closely resembled that of wrought C103.  

The research emphasized the importance of understanding environmental barrier coatings. Application temperature and duration directly impact material properties. These factors are crucial for optimizing performance in extreme environments.