|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Irradiation Responses of Ultrastrong Nano Precipitation Martensite Steel at Elevated Temperatures
||Tengfei Yang, Suihe Jiang, Yuan Fang, Congyi Li, Yugang Yugang, Zhaoping Lu, Steven Zinkle
|On-Site Speaker (Planned)
A recently-developed nano-precipitation martensite steel and conventional martensite steel (CMS) were irradiated with 5 MeV Fe to 13.7 dpa at four temperatures from 250 ºC to 650 ºC. Transmission electron microscopy (TEM) and Atom probe tomography (APT) were employed to investigate the irradiation-induced structural damage, precipitate stability and chemical segregation at different temperatures. It is found that nano-precipitation martensite steel (NMS) exhibited a greater resistance to irradiation-induced void formation than CMS, which is attributed to the high density of interfaces between nano-precipitates and matrix which serve as sinks for annihilation of irradiation-induced defects. Ion irradiation can induce the growth of nano precipitates and the growth kinetics show notable difference in the high temperature ion irradiation versus thermal annealing. The structural stability of NMS under high temperature ion irradiation and the mechanisms influencing the irradiation tolerances of NMS are discussed based on the TEM and APT results.
||Planned: Supplemental Proceedings volume