Morphology of the boron-rich phase along columnar grain boundary and its effect on the compression crack of Fe-6.5Si-0.05B alloy

▶ Three morphologies of alloy phases were observed under different conditions. ▶ Three different morphologies were thick-strip, fish-bone like and thin-strip. ▶ These phases were all with enrichment of boron and dilution of silicon. ▶ Three morphologies of alloy phases had different influences on mechanical property.