Abstract
ABSTRACTIn this study, high‐entropy alloy (HEA; CrMnFeCoNi) and austenitic stainless steel (SS; AISI304L) powders were consolidated to fabricate sintered compacts having a network structure composed of a coarse‐grained SS structure surrounded by an interconnected fine‐grained HEA structure. A small‐particle‐size HEA powder and large‐particle‐size SS powder were mixed at various volume ratios and then consolidated by spark plasma sintering. The threshold stress intensity factor range, ΔKth, for the sintered compacts with a HEA network structure did not depend on the volume fractions of HEA and SS, whereas ΔKth for the sintered compacts with the opposite SS network structure tended to decrease with increasing HEA content. The effective threshold stress intensity factor range, ΔKeff,th, for the HEA network structure was higher than that for the opposite SS network series because fatigue cracks preferentially propagated through the coarse‐grained SS structure with a high ΔKeff,th in the HEA network structure.
Published Version
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