High-performance multi-principal element high-entropy alloy containing C and preparation method thereof

Abstract

The invention discloses a C-containing high-performance multi-principal high-entropy alloy and a preparation method thereof, wherein the alloy comprises the following components in terms of atomic percentage: Co: 23-25%, Ni: 42-45% , Fe: 8-11%, Al: 9-11%, Ti: 11-13%, C: 1-2%, and the preparation method includes the steps of melting and casting, solution treatment, cold rolling treatment and aging heat treatment. Under the condition of room temperature, the tensile plasticity of the alloy reaches more than 15%, and the yield strength is higher than 1.0GPa. The high-performance alloy can be processed into various forms of products, and has broad application prospects in the fields of aerospace manufacturing fasteners and the like.

Description

High-performance multi-principal high-entropy alloy containing C and its preparation method technical field The present invention belongs to the field of preparation of ordered compound alloy materials, relates to the category of ordered compound toughening, especially aviation A ductile compound alloy material used in aerospace and other fields and a preparation method thereof. Background technique Atomically densely packed or crystalline ordered structure alloys are a class of materials bridging between ordinary metals and ceramics, with open Potential basis for the development of special mechanical properties. In particular, long-range ordered alloys have strong binding bonds, atomic mobility, and The high temperature diffusivity is low, so it is very suitable for use in high temperature environments. Since the 1950s, people have A lot of research has been done on the application of compounds, although a lot of considerable progress has been made, but it is limi...

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Problems solved by technology

For stoichiometric or Al-rich alloys, there is no plasticizing effect

Although trace amounts of B can improve Ni-rich Ni 3 Al alloys are brittle at room temperature, but due to the binary Ni 3 Al-based alloys have a single composition, and it is not easy to perform multiple performance adjustments for structural materials used under high temperature conditions

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