|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
||Mechanical Characterization of Three Neutron Irradiated HT-9 Heats (ORNL, LANL and EBR II) at LWR and Fast Reactor Relevant Temperatures
||Ramprashad Prabhakaran, Mychailo Toloczko, Kumar Sridharan
|On-Site Speaker (Planned)
9-12 weight% ferritic-martensitic steels such as HT-9 are being considered as candidate structural materials for fast, advanced LWR, and fusion reactors due to their excellent resistance to radiation-induced void swelling, good irradiation creep properties, microstructural stability, and thermal conductivity. However, the extreme hardening and low fracture toughness that occur at irradiation temperatures below 430°C is a serious issue. To address this concern, systematic investigations on the mechanical behavior and microstructure of HT-9 with slight variations in chemical composition and heat treatment are needed over a wide range of doses and temperatures to better understand the source of hardening. Mechanical characterization was performed on three HT-9 heats with different processing conditions irradiated to 6 dpa (Advanced Test Reactor, Idaho) at 291°C, 360°C and 431°C to understand the effects of radiation damage, and to provide insight on desirable HT-9 processing conditions.