Refractory high-entropy alloy with good room-temperature plasticity and preparation method of refractory high-entropy alloy
A high-entropy alloy and refractory technology, which is applied in the field of refractory high-entropy alloy and its preparation, can solve the problems of inability to guarantee processing performance, poor room temperature plasticity, restricting the application of turbine blades, etc., so as to enhance the solid solution strengthening effect and improve the room temperature. The effect of plasticity and high temperature strength, assuring workability and performance
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Embodiment 1
[0030] The refractory high-entropy alloy of this embodiment is denoted as V according to the molar ratio of each constituent element 24.5 Mo 15 Ta 30 Nb 30 B 0.5 .
[0031] like figure 1 As shown, the preparation method of the refractory high-entropy alloy of the present embodiment comprises the following steps:
[0032] Step 1: Prepare Mo, Ta, Nb, V and B raw materials with a quality and purity of more than 99.9%, remove the oxide scale from the surface of each raw material by grinding, and clean it with an ultrasonic cleaner, and then follow the target product refractory high entropy alloy. The molar ratio of the composition is batched;
[0033] Step 2, put the Mo, Ta, Nb metal raw materials in the raw materials prepared in the step 1 into the water-cooled copper crucible, put the V and B raw materials into the feeder, then close the smelting furnace, and vacuum the hearth of the smelting furnace to less than 2.5×10 - 3 Pa, and then filled with high-purity argon to ...
Embodiment 2
[0037] The refractory high-entropy alloy of this embodiment is denoted as V according to the molar ratio of each constituent element 24.5 Mo 15 Ta 30 Nb 30 B 0.5 .
[0038] like figure 1 As shown, the preparation method of the refractory high-entropy alloy of the present embodiment comprises the following steps:
[0039] Step 1: Prepare Mo, Ta, Nb, V and B raw materials with a quality and purity of more than 99.9%, remove the oxide scale from the surface of each raw material by grinding, and clean it with an ultrasonic cleaner, and then follow the target product refractory high entropy alloy. The molar ratio of the composition is batched;
[0040] Step 2, put the raw materials prepared in step 1 into the water-cooled copper crucible according to the order of melting point from low to high, namely V, B, Nb, Mo, Ta raw materials from bottom to top, then close the smelting furnace, and compare the smelting furnace. The furnace chamber is evacuated to less than 2.5×10 -3 P...
Embodiment 3
[0044] The refractory high-entropy alloy of this embodiment is denoted as V according to the molar ratio of each constituent element 20 Mo 10 Ta 35 Nb 34.7 B 0.3 .
[0045] The preparation method of the refractory high-entropy alloy in this example is the same as that in Example 2.
[0046] figure 2 The refractory high-entropy alloy V prepared by Examples 2 to 3 of the present invention 24.5 Mo 15 Ta 30 Nb 30 B 0.5 and V 20 Mo 10 Ta 35 Nb 34.7 B 0.3 The X-ray diffraction pattern of figure 2 It can be seen that the refractory high-entropy alloy V 24.5 Mo 15 Ta 30 Nb 30 B 0.5 and V 20 Mo 10 Ta 35 Nb 34.7 B 0.3 They are all single-phase BCC solid solution structures and belong to the category of high-entropy alloys.
[0047] image 3 The refractory high-entropy alloy V prepared by Examples 2 to 3 of the present invention 24.5 Mo 15 Ta 30 Nb 30 B 0.5 and V 20 Mo 10 Ta 35 Nb 34.7 B 0.3 The room temperature compressive stress-strain curve, from...
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Abstract
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