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Hexabasic high-entropy alloy and preparation method thereof

A high-entropy alloy, atomic percentage technology, applied in the field of metal materials and their preparation, can solve problems such as poor plasticity, and achieve the effect of simple and convenient preparation method

Active Publication Date: 2017-10-20
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The common problem of the above three alloy systems is that although the alloy has high strength, its plasticity is not good.

Method used

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  • Hexabasic high-entropy alloy and preparation method thereof
  • Hexabasic high-entropy alloy and preparation method thereof
  • Hexabasic high-entropy alloy and preparation method thereof

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Embodiment 1

[0031] A six-membered CoCrCu 0.5 FeNiTi high-entropy alloy material, wherein the atomic percentage range of the material composition is Co: 18.18-22.22at%, Cr: 18.18-22.22at%, Cu: 9.1-11.12at%, Fe: 18.18-22.22at%, Ni: 18.18 ~ 22.22at%, Ti: 2.17~18.18at%.

[0032] A kind of CoCrCu described in this embodiment 0.5 The preparation method of FeNiTi system high-entropy alloy, concrete steps are as follows:

[0033] (1) Ingredients: High-purity metal raw materials (≥99.95%) are accurately weighed and proportioned according to mass percentages for use in smelting alloys. The alloy composition is shown in Table 1.

[0034] Table 1: CoCrCu 0.5 FeNiTi x (x=0,0.1,0.3,0.5,1.0) Nominal composition of high entropy alloy (at%)

[0035]

[0036] (2) Smelting of high-entropy alloys: the present invention adopts WK type non-consumable vacuum electric arc furnace, puts the weighed elemental raw material into the water-cooled copper mold smelting pool in the WK type non-consumable vacuum...

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Abstract

The invention discloses a hexabasic high-entropy alloy material. The hexabasic high-entropy alloy material is prepared from, by atomic percent, 18.18%-22.22% of Co, 18.18%-22.22% of Cr, 9.1%-11.12% of Cu, 18.18%-22.22% of Fe, 18.18%-22.22% of Ni and 2.17%-18.18% of Ti, wherein the element Ti has the large atomic radius, and the severe lattice distortion effect of the element Ti can effectively enhance a solid solution phase. In addition, the element Ti has the small valence electron concentration and tends to form a compound phase, and therefore the precipitation enhancing function is achieved. An obtained hexabasic CoCrCu0.5FeNiTi0.5 high-entropy alloy has high strength and plasticity, wherein the yield strength is 850 MPa, the compressive strength reaches 1,650 MPa, and meanwhile the plasticity reaches 31.5%. The alloy has good strength and plasticity cooperation, and a preparation method is simple and reliable. The invention further discloses the preparation method of the hexabasic high-entropy alloy material.

Description

technical field [0001] The invention relates to the field of metal materials and their preparation, in particular to a novel CoCrCuFeNiTi high-entropy alloy material and a preparation method thereof. Background technique [0002] Taiwanese scholar Ye Junwei defined alloys composed of five or more main elements with an atomic percentage between 5% and 35% as high-entropy alloys. Due to the high mixing entropy effect, high-entropy alloys not only do not form a large number of intermetallic compounds after solidification, but tend to form simple body-centered cubic (BCC) or face-centered cubic (FCC) phases. High-entropy alloys not only have a phase structure different from traditional alloys, but also exhibit higher strength, hardness, wear resistance, corrosion resistance, and thermal stability. They are structural materials with broad application prospects. After more than ten years of development, high-entropy alloys have become one of the research hotspots in the field of ...

Claims

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Application Information

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IPC IPC(8): C22C30/02C22C1/02
CPCC22C1/02C22C30/02
Inventor 刘宁吴朋慧彭振杜文栋陈晨王小京俞波
Owner JIANGSU UNIV OF SCI & TECH
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