The present disclosure further relates to metallic alloy comprising Fe at a level of 65.5 to 80.9 atomic percent; Ni at 1.7 to 15.1 atomic percent; B at 3.5 to 5.9 atomic percent; and Si at 4.4 to 8.6 atomic percent, wherein the alloy indicates a matrix grain size of 500 nm to 20,000 nm and boride {HEAD ~ grain size} of {TAIL ~ 100 nm} to 2500 nm 
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The present disclosure further relates to metallic alloy comprising Fe at a level of 65.5 to 80.9 atomic percent ; Ni at 1.7 to 15.1 atomic percent ; B at 3.5 to 5.9 atomic percent ; and Si at 4.4 to 8.6 atomic percent , wherein the alloy indicates a matrix grain size of 500 nm to 20,000 nm and boride { HEAD ~ grain size } of { TAIL ~ 100 nm } to 2500 nm
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