High-temperature-resistant high-entropy alloy material and preparation method thereof
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A high-entropy alloy and high-temperature-resistant technology, which is applied in the field of alloy materials to achieve good toughness and plasticity
Active Publication Date: 2015-12-02
TAIYUAN UNIV OF TECH
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Problems solved by technology
At present, the reported high-entropy alloy systems are mainly based on transition metal elements, such as iron, nickel,
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Embodiment 1
[0053] Example 1: Alloy V 25 Nb 25 Mo 25 Ta 25 preparation method
[0054] Include the following steps:
[0055] 1. Select V, Nb, Mo, Ta with a purity higher than 99.9% (wt.) as raw materials, according to V 25 Nb 25 Mo 25 Ta 25 The ingredients are proportioned;
[0056] 2. Using a high-vacuum non-consumable arc melting furnace, and under the protection of 99.999% high-purity argon, the raw materials are smelted into master alloy button ingots, and the button ingots are turned over for 6 to 8 times during each smelting to ensure that the alloy Uniform melting;
[0057] 3. Use the metallographic inlay prototype to inlay the four button ingots into sizes of the sample;
[0058] 4. Use 100#, 240#, 400#, 600#, 800#, 1000#, 1200# and 1500# metallographic sandpaper to smooth the surface of the sample, and then mechanically polish the sample to obtain an alloy material.
Embodiment 2
[0059] Example 2: Alloy V 25 Nb 25 Ta 25 W 25 preparation method
[0060] Select V, Nb, Ta and W with a purity higher than 99.9% (wt.) as raw materials, according to V 25 Nb 25 Ta 25 W 25 The ingredients are proportioned;
[0061] Subsequent steps are the same as in Example 1.
Embodiment 3
[0062] Example 3: Ti 20 V 20 Nb 20 Mo 20 Ta 20 preparation method
[0063] Select Ti, V, Nb, Mo, Ta with a purity higher than 99.9% (wt.) as raw materials, according to Ti 20 V 20 Nb 20 Mo 20 Ta 20 The ingredients are proportioned;
[0064] Subsequent steps are the same as in Example 1.
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Abstract
The invention discloses a high-temperature-resistant high-entropy alloy material and a preparation method thereof, and belongs to the technical field of the alloy materials. The preparation method comprises the steps that four of Ti, V, Nb, Mo, Ta and W are adopted as raw materials; the raw materials are smelted into mother alloy button ingots by a high-vacuum nonconsumable arc melting furnace under high-purity argon shielding; the four button ingots are mounted to be samples in the sizes of phi 20mmx10mm by a metallurgical phase mounting press; the surfaces of the samples are smoothed by 100#, 240#, 400#, 600#, 800#, 1000#, 1200# and 1500# metallurgical phase abrasive paper; then the samples are subjected to mechanical polishing; a crystal structure is determined by an X-ray diffractometer; a scanning electron microscope is used to observe the morphology of a microstructure; a room temperature quasi-static compression performance test is carried out; and the obtained four alloys have higher yield strength and work hardening capacity.
Description
technical field [0001] The invention relates to a high-temperature-resistant high-entropy alloy material and a preparation method thereof, belonging to the technical field of alloy materials. Background technique [0002] High-entropy alloys are considered to be one of the three major breakthroughs in alloying theory in recent decades (the other two are bulk metallic glasses and rubbery metals), representing a new world of alloys that can be synthesized, analyzed, and controlled. High-entropy alloys have a combination of high hardness, high work hardening, high temperature softening resistance, high temperature oxidation resistance, corrosion resistance, and high electrical resistivity, and their performance is no less than that of traditional alloys. It can be seen that the potential application prospects of high-entropy alloys are very broad. High-entropy alloys can generally be defined as the alloying of various constituent elements in an equiatomic ratio or close to an ...
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