| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
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| Symposium
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Tackling Metallic Structural Materials Challenges for Advanced Nuclear Reactors
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| Presentation Title |
Radiation Performance of Doped High Entropy Alloys NiCoFeCr-3X (X=Pd/Al/Cu) |
| Author(s) |
Boopathy Kombaiah, Sriswaroop Dasari, Robby Renfrow, Hangyu Li, Jonathan D Poplawsky, Dilpuneet Aidhy, Mukesh Bachhav, Philip Edmondson, Kevin Field, Yanwen Zhang |
| On-Site Speaker (Planned) |
Boopathy Kombaiah |
| Abstract Scope |
The growth of advanced energy technologies for power generation is enabled by the design, development, and integration of structural materials that can withstand extreme environments, such as high temperatures, radiation damage, and corrosion. High-entropy alloys (HEAs) are emerging candidate materials for structural applications in advanced nuclear concepts due to their good radiation performance, mechanical properties, and corrosion properties. However, challenges like radiation-induced phase instability and void swelling at high doses in some HEAs exist. In this talk, we will discuss the effects of adding Pd, Al, or Cu in low concentrations on the radiation performance of NiCoFeCr model HEA studied using ex situ and in situ irradiation experiments. The microstructural evolution upon irradiation i.e., formation of dislocation networks, radiation induced segregation and precipitation, and void formation will be presented. Nanoprecipitates formed in NiCoFeCr-3Cu are found to drastically improve its resistance to radiation-induced swelling and hardening even at high doses. |