Five-element FeCoNiMoSi series high-entropy alloy and preparing method thereof

A technology of high-entropy alloys and alloys, applied in the field of FeCoNiMoSi high-entropy alloy materials and their preparation, can solve the problems of alloy plasticity reduction and achieve the effect of excellent plasticity

Active Publication Date: 2018-12-07
JIANGSU YONGHAO HIGH STRENGTH BOLT
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Problems solved by technology

[0004] Al 0.5 CoCrCuFeNiSi x (x=0, 0.4, 0.8) The increase of Si content in the high-entropy alloy promotes the transformation of FCC phase to BCC phase in the a

Method used

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  • Five-element FeCoNiMoSi series high-entropy alloy and preparing method thereof
  • Five-element FeCoNiMoSi series high-entropy alloy and preparing method thereof
  • Five-element FeCoNiMoSi series high-entropy alloy and preparing method thereof

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Example Embodiment

[0021] The preparation process of embodiment 1 high entropy alloy is as follows:

[0022] 1) Raw material preparation: The mass percentage is converted according to the atomic percentage, and the high-purity metal raw materials (≥99.95%) are accurately weighed and proportioned according to the mass percentage for smelting alloys. The alloy composition is shown in Table 1. According to x=1, 2, 3, 4, and 5, it is represented by Si1, Si2, Si3, Si4 and Si5 respectively.

[0023] Table 1. (FeCoNi) 75 Mo 25-x Si x (x=1, 2, 3, 4, 5) Nominal composition (at%) of high entropy alloys.

[0024]

[0025] 2) Smelting of high-entropy alloys: The WK type non-consumable vacuum electric arc furnace is used in this embodiment, and the weighed elemental raw materials are put into the water-cooled copper mold smelting pool in the vacuum electric arc furnace, and oxygen-absorbing titanium is placed in the middle of the crucible, and then Close the oven door and tighten the knob. Then vacuu...

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Abstract

The invention discloses a five-element FeCoNiMoSi series high-entropy alloy and a preparing method thereof. The problem that existing structural steel is poor in heat resistance property is solved. The high-entropy alloy is composed of five elements of Fe, Co, Ni, Mo and Si; the atomic percents of Fe, Co and Ni are 25%, the atomic percent of Mo and the atomic percent of Si are 20 to 24% and 1 to 5% correspondingly, the high-entropy alloy is mainly composed of a face-centered cubic phase, a topological close-packed phase Mu and a Leaves phase, and along with increasing of the Si content, the simple cube structural phase is formed. The obtained five-element FeCoNiMoSi series high-entropy alloy has the higher strength and plasticity, and the alloy can serve as a structural material to be applied to the heat resistance field.

Description

technical field [0001] The invention relates to the field of metal materials and their preparation, in particular to a novel FeCoNiMoSi high-entropy alloy material and a preparation method thereof. technical background [0002] In thermodynamics, the entropy value represents the degree of chaos of the system. The greater the entropy value, the greater the degree of chaos of the system. The system undergoes a spontaneous process. When the entropy reaches the maximum value, the system tends to be stable and reaches equilibrium. A high-entropy alloy is a new type of alloy formed by mixing five or more elements in an equimolar ratio or close to an equimolar ratio. In a broad sense, as long as the atomic percentage of each principal atom is in the range of 5% to 35%, it can be called a high-entropy alloy. In high-entropy alloys, no element content exceeds 50%, which means that this type of alloy is collectively led by a variety of elements to express its characteristics. [000...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C30/00
CPCC22C1/02C22C30/00
Inventor 刘宁彭振陈晨杜文栋王小京
Owner JIANGSU YONGHAO HIGH STRENGTH BOLT
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