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Meeting MS&T23: Materials Science & Technology
Symposium High Temperature Corrosion and Degradation of Structural Materials
Presentation Title Liquid Metal Embrittlement Assessment of F82H in Li
Author(s) Marie Romedenne, Charles S. Hawkins, Dean Pierce, Bruce A. Pint
On-Site Speaker (Planned) Marie Romedenne
Abstract Scope The susceptibility to liquid metal embrittlement (LME) of reduced activation ferritic-martensitic (RAFM) steels, promising structural materials for fusion blankets and plasma facing components, was evaluated. Hollow tensile specimens of a RAFM-type steel F82H and a martensitic carbon steel 4340, known for its susceptibility to LME, were tensile tested while containing commercial liquid lithium to assess their LME susceptibility at 200 C after 1h at 200C or 400C. For the 4340 steel, LME was confirmed at 200 and 400 C and the specimens failed with little plastic deformation and the fracture surface exhibited a dimple structure at 200 C and failed in a brittle manner at 400C. The results of the tensile tests indicated that the F82H steel was not significantly susceptible to LME at both temperatures even after liquid metal corrosion exposure (500 h at 500C) The observed LME effects were evaluated in terms of metallurgic state and extent of decarburization in liquid lithium.


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