|About this Abstract
||MS&T23: Materials Science & Technology
||High Temperature Corrosion and Degradation of Structural Materials
||Liquid Metal Embrittlement Assessment of F82H in Li
||Marie Romedenne, Charles S. Hawkins, Dean Pierce, Bruce A. Pint
|On-Site Speaker (Planned)
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 200°C or 400°C.
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 400°C. 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 500°C)
The observed LME effects were evaluated in terms of metallurgic state and extent of decarburization in liquid lithium.