Electric current-induced liquation features of cast pure tin

Electric current-induced liquation feature of cast pure β-tin under alternating current (AC) was investigated in this study. According to the experimental results, the initial fusion emerges from grain interior. Since the fusion paths traverse the grain boundaries preferentially in a highangle manner, their track inside a grain tends to be curved and thus longer than the grain size. Continued electrification leads fusion paths to form network-like interconnected fusion structure with most triple junctions residing within grain interior. Lateral thickening of the interconnected fusion paths leads to final failure. The result that the network-like fusion structure is rather equiaxed can eliminate the effect of crystal anisotropy on the fusion behavior if it exists.