A research fellow developed high entropy cast iron alloy by adding Carbon to Cantor high entropy alloy composition (FeCoCrNiMn). However, white cast irons (especially high Cr cast irons) are known to contain carbide forming elements which help to enhance the hardness and wear resistance of such alloys. What if one decides to develop the high entropy cast iron by considering carbide forming elements (Cr, Mo and V) together with Co for high temperature effect? I tried to determine the average melting temperature of such an alloy and got a value within the range of 2000k. Would this alloy be economically feasible if it can be processed in an atmospheric environment?
I think the proposed alloy could be a better option for hard facing application than for producing castings. Addition of vanadium could pose some problem for making castings.
Krishnan Raja thanks a lot for your reply. To use the alloy for hard facing application, what would be the best process technology for producing the alloy? Can it be possible for you to throw more light on the issue of Vanadium with respect to casting?
I would go for plasma or laser melting of mechanically alloyed powder mixture representing the HEA composition.
Large volume fraction of carbide formation results in hot cracking or heat check (stress relief) cracking. V(C,N) precipitates leads to dip in hot ductility in low and medium carbon steels. Ti and Nb also lead to carbonitride precipitation. I would anticipate similar behavior in the HEA also. I may be wrong!
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