Preparation method of multi-crystal-granule-size multi-layer high-entropy alloy

Abstract

The invention belongs to the field of material preparation, and particularly relates to a preparation method of a multi-crystal-granule-size multi-layer high-entropy alloy. The preparation method of the multi-crystal-granule-size multi-layer high-entropy alloy comprises the following steps of (1) pretreating: selecting more than two high-entropy alloys, wherein each high-entropy alloy is a single phase and cannot happen phase change in the heating process, and each high-entropy alloy at least contains one FCC and BCC-structure single phase; (2) casting: carrying out solid-liquid inlaying and casting on the liquid-state high-entropy alloy and the solid-state high-entropy alloy, and forming a multi-layer high-entropy alloy; (3) rolling: cutting the multi-layer high-entropy alloy to obtain a multi-layer high-entropy alloy block, and rolling to obtain a rolling-state multi-layer high-entropy alloy; and (4) forming a multi-crystal-granule-size: carrying out heat treatment on the rolling-state multi-layer high-entropy alloy, and obtaining the multi-crystal-granule-size multi-layer high-entropy alloy. The preparation method of the multi-crystal-granule-size multi-layer high-entropy alloy provided by the invention adopts a multi-alloy solid-liquid mixed casting and forming method, the prepared high-entropy alloy has toughness and strength of a soft phase and a hard phase to a certain degree, and the high-strength high-toughness double-system or multi-system refined crystalline strengthening high-entropy alloy with a favorable combination property is obtained.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing a multi-grain-scale multilayer high-entropy alloy. Background technique [0002] At present, the traditional alloys used on a large scale are mainly based on one or two elements, and then adding a small amount of other elements to change the structure and properties of the material to meet the performance requirements of the use, and for a long period of time, material scientists They can only be limited to this when designing alloys. They believe that too many elements in the alloy will cause complex intermetallic compounds to appear, and the material properties cannot meet the application requirements. [0003] In the 1990s, Professor Junwei Ye and Professor Cantor proposed a new material design method almost at the same time. Compared with traditional alloys, one or two elements are mainly used, and a small amount of other trace elements are added to ...

AI Technical Summary

Problems solved by technology

However, the multi-grain-scale high-entropy alloy prepared in this way can only target one type of high-entropy alloy, and cannot use multiple high-entropy alloys for comprehensive performance, and the way of strengthening and toughening is relatively simple; when a single high-entropy alloy costs When higher, the cost of high-entropy alloys cannot be controlled and the heat resistance is poor

Images