Ultrasonic-assisted preparation method of 2219 aluminum-based high-entropy alloy composite material

Abstract

The invention relates to an ultrasonic-assisted preparation method of a 2219 aluminum-based high-entropy alloy composite material. The mass of each component is calculated according to the molar atomic ratio and mass fraction of each element of an AlCoCrFeNi high-entropy alloy, powder of each component is weighed according to the quantity, and after uniform mixing, ball milling is carried out to prepare AlCoCrFeNi high-entropy alloy particles; the AlCoCrFeNi high-entropy alloy particles are weighed for standby application according to the prefabrication proportion of reinforced phase particles in the composite material; a 2219 aluminum alloy material is weighed, heated and subjected to heat preservation, and 2219 aluminum melt is obtained; the AlCoCrFeNi high-entropy alloy particles are added into the 2219 aluminum melt; a preheated ultrasonic tool rod is inserted into the aluminum melt to carry out ultrasonic vibration treatment; after vibration application is finished, the ultrasonic tool rod is taken out, the melt is poured into a preheated square stainless steel mold, flowing water cooling is carried out, and a 2219 aluminum-based composite material ingot is preliminarily obtained; and the cooled composite material ingot is put into a homogenizing furnace to be heated and subjected to heat preservation, homogenizing annealing treatment is carried out, and the final 2219 aluminum-based AlCoCrFeNi high-entropy alloy composite material is obtained.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite material casting, and in particular relates to an ultrasonic-assisted preparation method of a 2219 aluminum-based high-entropy alloy composite material. Background technique [0002] 2219 aluminum alloy has low density, good stress corrosion resistance, low temperature stability and excellent welding performance, and is widely used in fields with energy saving requirements such as aerospace, weapon manufacturing, automobile and railway transportation and other industries. However, due to the coarse grains of cast 2XXX aluminum alloys, agglomeration of eutectic structure and low strength, its wide application in stressed structural parts is limited. [0003] AlCoCrFeNi high-entropy alloy has high strength, hardness, high temperature oxidation resistance, corrosion resistance, high temperature creep resistance and other characteristics, which are unmatched by traditional metal material...

AI Technical Summary

Problems solved by technology

However, a large number of studies have shown that when aluminum-based high-entropy alloy composites are prepared by ordinary casting methods, AlCoCrFeNi high-entropy alloys have poor fluidity and are prone to agglomeration in aluminum alloys, which is not conducive to the improvement of the strength of composite materials.

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