High-entropy alloy particle reinforced magnesium-based composite material and preparation method thereof

Abstract

The invention discloses a high-entropy alloy particle reinforced magnesium-based composite material and a preparation method thereof. The preparation method comprises the following steps: S1, removing an oxide layer on the surface of a magnesium alloy plate; s2, the magnesium alloy plate is machined into a proper size through linear cutting; s3, uniformly distributed blind holes are drilled in the cut magnesium alloy plate according to the size of the cut magnesium alloy plate; the diameter of the blind holes is 4-6% of the width of the magnesium alloy plate, the depth of the blind holes is 70-90% of the thickness of the magnesium alloy plate, and the hole pitch of the blind holes is 10-20% of the width of the magnesium alloy plate; s4, the blind holes are filled with high-entropy alloy particles and compacted, stirring friction is conducted through a needle-free stirring head, and hole sealing treatment is conducted; and S5, a threaded needle stirring head is used, the center of the stirring head is aligned with the center of the blind hole, stirring friction machining is conducted, and the high-entropy alloy particle reinforced magnesium-based composite material is obtained. According to the prepared composite material, high-entropy alloy particles serve as a reinforcing phase, magnesium alloy serves as a matrix, the mass fraction of the high-entropy alloy particles is 12-18%, and the mass fraction of a magnesium alloy plate is 82-88%.

Description

technical field [0001] The invention relates to the technical field of metal matrix composite material manufacturing, in particular to a high-entropy alloy particle-reinforced magnesium matrix composite material and a preparation method thereof. Background technique [0002] Magnesium matrix composites have the advantages of good high temperature resistance, wear resistance, impact resistance and excellent shock absorption performance. Therefore, it has a wide range of applications and research in many fields. Its preparation methods include powder metallurgy, casting metallurgy, friction stir, etc. The commonly used reinforcements can be divided into fiber reinforcement, whisker reinforcement, particle reinforcement, etc. according to shape. Since particle-reinforced magnesium matrix composites have the same uniformity as the matrix, particle-reinforced magnesium matrix composites have relatively more research. [0003] At present, the commonly used particle-reinforced mag...

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Problems solved by technology

[0003] The commonly used particle-reinforced magnesium-based composite materials are SiC, ZrO 2 , Ti particles and other ceramic particles; although it can effectively improve the hardness, strength and elongation of the material, it greatly reduces the ductility of the processed composite material

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