“…The major compatibility concerns include corrosion, mass transfer and degradation of the mechanical properties of the containment materials. As for stainless steels, which are the main structural materials of many serving fusion testing facilities [6,7], experimental observations show that the corrosion process is accompanied by the penetration of lithium into both the grain boundaries [8] and bulk materials [9], the dissolution of alloying elements into liquid lithium and mass transfer due to temperature and concentration gradients [10]. The loss of alloying elements results in the formation of a porous layer and even phase transformation [11][12][13].…”