Mesoscale modeling of solute precipitation and radiation damage

Zhang, Yongfeng¹  Schwen, Daniel¹  Ke, Huibin¹  Univ. of Wisconsin, Madison, WI (United States)]  Bai, Xianming¹  Hales, Jason¹ 

[1] Idaho National Lab. (INL), Idaho Falls, ID (United States)

关键词: PRECIPITATION;    PRESSURE VESSELS;    SOLUTES;    CRYSTAL DEFECTS;    MICROSTRUCTURE;    PHYSICAL RADIATION EFFECTS;    TIME DEPENDENCE;    IRRADIATION;    COMPUTERIZED SIMULATION;    EMBRITTLEMENT;    RADIATION HARDENING embrittlement;    microstructure;    multiscale modeling;    reactor pressure vessel;   

DOI  :  10.2172/1260885
RP-ID  :  INL/EXT--15-36754
PID  :  OSTI ID: 1260885
Others  :  TRN: US1601564

美国|英语

来源: SciTech Connect

【 摘 要 】

This report summarizes the low length scale effort during FY 2014 in developing mesoscale capabilities for microstructure evolution in reactor pressure vessels. During operation, reactor pressure vessels are subject to hardening and embrittlement caused by irradiation-induced defect accumulation and irradiation-enhanced solute precipitation. Both defect production and solute precipitation start from the atomic scale, and manifest their eventual effects as degradation in engineering-scale properties. To predict the property degradation, multiscale modeling and simulation are needed to deal with the microstructure evolution, and to link the microstructure feature to material properties. In this report, the development of mesoscale capabilities for defect accumulation and solute precipitation are summarized. Atomic-scale efforts that supply information for the mesoscale capabilities are also included.