High Entropy Alloy with Heterogenous Complex Microstructure and The Manufacturing Method Thereof

摘要

The present invention is a metastable hyperdissolution of solid solution atoms containing B, C, N, O, P and S in a penta-membered high entropy alloy (HEA) matrix composed of Cr, Mn, Fe, Co and Ni ( It relates to an alloy having a heterogeneous complex microstructure developed through recrystallization delay and precipitation control after metastable supersaturation, and this alloy has improved mechanical properties compared to the existing solid solution alloy without precipitates characterized in that At this time, the non-uniform microstructure HEA due to the high solid solution element is made of an alloy element whose matrix is selected from the group of alloys containing five alloy elements such as Cr, Mn, Fe, Co and Ni, such a base alloy In, B, C, N, O, P and S may be prepared by simultaneously alloying a solid solution element selected from the group consisting of S. In addition, by performing a multi-stage precipitation process leading to deformation and heat treatment on the thus-prepared alloy, it is possible to manufacture HEA having a heterogeneous complex microstructure. Through this, not only can it be applied as structural materials that require excellent toughness and high strength, but also structural materials that respond to extreme environments such as projectile propulsion units, nuclear pressure vessels, cladding tubes, and high-efficiency next-generation thermal power generation turbine blades, which were not possible with existing materials. There is an effect that can be applied as