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Title: Recent status and improvement of reduced-activation ferritic-martensitic steels for high-temperature service

Journal Article · · Journal of Nuclear Materials
ORCiD logo [1];  [1];  [2];  [2]; ORCiD logo [3];  [4];  [5];  [6]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Saclay Nuclear Research Centre (France)
  3. Karlsruhe Inst. of Technology (Germany)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); National Inst. for Quantum and Radiological Science and Technology, Aomori (Japan)
  5. National Inst. for Quantum and Radiological Science and Technology, Aomori (Japan)
  6. Chinese Academy of Sciences (CAS), Anhui (China)

Reduced-activation ferritic-martensitic (RAFM) steels, candidate structural materials for fusion reactors, have achieved technological maturity after about three decades of research and development. The recent status of a few developmental aspects of current RAFM steels, such as aging resistance, plate thickness effects, fracture toughness, and fatigue, is updated in this paper, together with ongoing efforts to develop next-generation RAFM steels for superior high-temperature performance. Additionally, to thermomechanical treatments, including nonstandard heat treatment, alloy chemistry refinements and modifications have demonstrated some improvements in high-temperature performance. Castable nanostructured alloys (CNAs) were developed by significantly increasing the amount of nanoscale MX (M = V/Ta/Ti, X = C/N) precipitates and reducing coarse M23C6 (M = Cr). Preliminary results showed promising improvement in creep resistance and Charpy impact toughness. We present and compare limited low-dose neutron irradiation results for one of the CNAs and China low activation martensitic with data for F82H and Eurofer97 irradiated up to ~70 displacements per atom at ~300–325 °C.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1286969
Alternate ID(s):
OSTI ID: 1359434
Journal Information:
Journal of Nuclear Materials, Vol. 479, Issue C; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 62 works
Citation information provided by
Web of Science

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