About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Understanding Corrosion-Related Cracking
|
| Presentation Title |
Impact of alloy composition and liquid chemistry on cracking susceptibility of fusion candidate structural materials in liquid lithium |
| Author(s) |
Marie Romedenne, Claude De Lamater-Brotherton, Bruce A. Pint |
| On-Site Speaker (Planned) |
Marie Romedenne |
| Abstract Scope |
Lithium is considered as one of the leading liquid breeder and cooling fluid in future fusion reactors. However, the use of liquid metals poses compatibility challenges that necessitate addressing. Previous studies have shown that reducing flow rate and temperature of liquid lithium and the concentration of non-metallic impurities (particularly nitrogen) decreased mass loss rates of austenitic and ferritic steels. There is, however, very limited understanding on the combined effects of stress and liquid metal exposure on the compatibility of candidate fusion structural materials in liquid lithium. In the present study, tensile specimens of reduced activation ferritic martensitic (RAFM) steel and vanadium-based alloys were exposed in lithium with varying non-metallic impurities. After exposure, room temperature tensile testing and microstructural analyses were performed to evaluate crack length and density along the specimens as well as lithium-induced dissolution of strengthening phases as a function of impurities in Li and alloy composition and microstructure. |