AlCoCrFeMn high-entropy alloy with non-equal atomic ratio and preparation method of AlCoCrFeMn high-entropy alloy

A high-entropy alloy and atomic ratio technology, applied in the field of metal materials, can solve the problems of expanding the composition range of high-entropy alloys, difficulty in balancing plasticity and strength, and low elongation, so as to achieve low diffusion activity and realize the adjustment of strength and plasticity , the effect of high thermal stability

Active Publication Date: 2020-06-05
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that most of the current high-entropy alloys do not have outstanding performance advantages compared with traditional alloys, and it is difficult to balance the contradiction between plasticity and strength. High-entropy alloys with FCC solid solution structure have higher tensile elongation. B

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A non-equiatomic ratio AlCoCrFeMn high-entropy alloy, characterized in that the atomic ratio of elements in the high-entropy alloy is Al:Co:Cr:Fe:Mn=0.3:2:1:1:1. The preparation method is as follows: (1) Weigh the raw materials according to the alloy composition ratio and place them in alcohol, then ultrasonically clean and dry them; (2) Put the raw materials in a water-cooled Cu crucible and then put them into a non-consumable arc melting furnace , evacuated to 3×10 -3 Pa, and then add nitrogen to the furnace to 0.05MPa; (3) first smelt the pure Ti block placed in the furnace twice, further remove the residual oxygen in the furnace, and then smelt the raw material for 5 times, and then suck it with a Cu mold Cast to obtain alloy ingot; (4) Carry out 24 hours vacuum solid solution to alloy ingot at 1000 ℃, water quenching, then

[0023] Rolling deformation at 600°C, the deformation amount is 90%; (5) Vacuum annealing treatment for 1 hour on the rolled and deformed allo...

Embodiment 2

[0026] A non-equiatomic ratio AlCoCrFeMn high-entropy alloy, characterized in that the atomic ratio of elements in the high-entropy alloy is Al:Co:Cr:Fe:Mn=0.5:2:1:1:1. The preparation method is as follows: (1) Weigh the raw materials according to the alloy composition ratio and place them in alcohol, then ultrasonically clean and dry them; (2) Put the raw materials in a water-cooled Cu crucible and then put them into a non-consumable arc melting furnace , evacuated to 3×10 -3 Pa, then add argon to the furnace to 0.07MPa; (3) Melt the pure Ti block pre-placed in the furnace 3 times, further remove the residual oxygen in the furnace, and then melt the raw material 6 times, and then use Cu mold Suction casting to obtain an alloy ingot; (4) vacuum solid solution the alloy ingot at 1100°C for 18 hours, water quenching, and then rolling deformation at 700°C, with a deformation of 75%; (5) rolling at 900°C The deformed alloy ingot was subjected to vacuum annealing treatment for 2 h...

Embodiment 3

[0029] A non-equiatomic ratio AlCoCrFeMn high-entropy alloy, characterized in that the atomic ratio of elements in the high-entropy alloy is Al:Co:Cr:Fe:Mn=0.7:2:1:1:1. The preparation method is as follows: (1) Weigh the raw materials according to the alloy composition ratio and place them in alcohol, then ultrasonically clean and dry them; (2) Put the raw materials in a water-cooled Cu crucible and then put them into a non-consumable arc melting furnace , evacuated to 3×10 -3 Pa, and then add helium to the furnace to 0.06MPa; (3) first smelt the pure Ti block pre-placed in the furnace 5 times, further remove the residual oxygen in the furnace, and then smelt the raw material 8 times, and then use Cu mold Suction casting to obtain an alloy ingot; (4) vacuum solid solution the alloy ingot at 1200°C for 20 hours, water quenching, and then rolling deformation at 800°C, with a deformation of 60%; (5) rolling at 1000°C The deformed alloy ingot was subjected to vacuum annealing tre...

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Abstract

The invention discloses an AlCoCrFeMn high-entropy alloy with a non-equal atomic ratio and a preparation method of the AlCoCrFeMn high-entropy alloy. The atomic ratio of all elements of Al to Co to Crto Fe to Mn in the high-entropy alloy is equal to (0.3-0.7): to 2 to 1 to 1 to 1. The preparation method comprises the following steps that (1) a raw material is taken in proportion, and cleaning anddrying are conducted; (2) the raw material is put into a non-consumable arc melting furnace, vacuumizing is conducted and protective gas is added; (3) Ti which is arranged in the furnace in advance is firstly smelted, then the raw material is smelted, and suction casting is conducted by using a copper mold to form an alloy ingot; (4) the alloy ingot is subjected to solid solution, water quenchingand rolling deformation; and (5) the deformed alloy ingot is annealed to obtain the AlCoCrFeMn high-entropy alloy with the unequal atomic ratio. According to the AlCoCrFeMn high-entropy alloy with the non-equal atomic ratio and the preparation method of the AlCoCrFeMn high-entropy alloy, by adding a certain amount of Co element, the strength of the high-entropy alloy is improved, the content of the Co element is increased, and the alloy has good thermal stability; and the plasticity of the high-entropy alloy is adjusted by adding a certain amount of Al element, and the prepared high-entropy alloy has good strength and plasticity.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a non-equiatomic ratio AlCoCrFeMn high-entropy alloy and a preparation method thereof. Background technique [0002] For a long time, the design of metal materials has been to use one element or two elements as the main element of the alloy, and then add one or more trace elements to modify a certain property. In 2004, Brain Cantor and other scholars successfully designed six alloys of FeCrMnNiCo, FeCrMnNiCoNb, FeCrMnNiCoGe, FeCrMnNiCoCu, FeCrMnNiCoTi and FeCrMnNiCoV based on the concept of equiatomic ratio multi-component alloys, and found that these alloys did not produce complex structural phases, but instead formed by face-centered cubic (FCC) or face-centered cubic plus body-centered cubic (BCC) simple structures. In the same year, Professor Ye Junwei of Tsinghua University in Taiwan and other scholars proposed a new alloy design concept, named this type of alloy as...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02B22D18/08C22F1/10C22F1/02
CPCB22D18/08C22C1/02C22C19/005C22C19/07C22C30/00C22F1/02C22F1/10
Inventor 张扬秦希云孙顺平李中春李小平卢雅琳
Owner JIANGSU UNIV OF TECH
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