|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
||Compositionally Graded Specimen: A High-throughput Approach for Nuclear Material Development
||Jingfan Yang, Laura Hawkins, Miao Song, Lingfeng He, Zhijie Jiao, Yongfeng Zhang, Daniel Schwen, Xiaoyuan Lou
|On-Site Speaker (Planned)
We demonstrate the compositionally graded specimen fabricated by laser additive manufacturing (AM) can accelerate the nuclear alloy synthesis and testing by 5-10 times. The study evaluates the effects of low-level refractory alloying elements on the proton-radiation induced damages and degradation in austenitic stainless steel, including swelling and loops, radiation induced segregation (RIS), radiation hardening, irradiation assisted stress corrosion cracking (IASCC). The results were benchmarked to the same materials produced by conventional forging. Under as-built condition, the materials produced by laser AM exhibited higher resistance to radiation damages and IASCC than wrought materials. Through post-AM thermomechanical treatment, recrystallization produced wrought-like equiaxed coarse grains across the graded specimen, which yielded similar radiation and IASCC resistance as its wrought counterparts. Although the demonstration was conducted with proton-irradiated specimens, we emphasize this high-throughput approach may be employed for neutron irradiation, and significantly reduces the cost of structural alloy development and qualification for nuclear applications.
||Additive Manufacturing, Nuclear Materials, Iron and Steel