About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
High-Entropy Materials: Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond VI
|
| Presentation Title |
Systematic Investigation on the Mechanical and Deformation behavior of Additively Manufactured NiCoCr Alloy Under Various Environments |
| Author(s) |
Thaer Syam, Adnan Khan, Imroj Syed, Ibrahim Karaman, Bilal Mansoor |
| On-Site Speaker (Planned) |
Thaer Syam |
| Abstract Scope |
NiCoCr medium entropy alloy (MEA) possess a promising combination of superior mechanical properties, such as fracture toughness, and resistance to corrosion and oxidation. At cryogenic temperatures, deformation is dominated by nano-twinning and transformation-induced plasticity (TRIP), leading to enhanced properties. Our study evaluates the mechanical and deformation behavior of Directed Energy Deposition (DED)-fabricated NiCoCr medium entropy alloy (MEA) across a wide range of temperatures, with particular focus on cryogenic and high-temperature regimes. Fully dense, near defect free NiCoCr coupons (>99% relative density) were achieved following a well-established DED process parameters optimization framework. Initially at ambient air, the printed materials showed ultimate tensile strengths of up to 801 MPa and ~45 % elongation. The next stage is to precisely study the mechanical properties and the deformation mechanisms through a Strain Rate Sensitivity (SRS) analysis at the extreme conditions. This work bridges additive manufacturing and thermomechanical performance of the alloy for extreme environments. |