Low-density high-strength high-plasticity high-entropy alloy material and preparation method thereof
A high-entropy alloy, high-strength technology, applied in the field of metal materials, can solve the problems of large composition difference, difficult to handle, imperfect preparation process of low-density high-entropy alloy, etc., and achieve the effect of low density
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[0038] The embodiment of the present invention provides a Ti a V b Zr c Nb d x e A design and preparation method of a series of high-entropy alloy materials, including the following processes:
[0039] 1. Composition design
[0040] First, in order to obtain refractory high-entropy alloy materials with low density and high plasticity, we select low-density refractory alloy elements with intrinsic plasticity, including titanium (ρ Ti =4.54g / cm 3 ), vanadium (ρ V =6.11g / cm 3 ), zirconium (ρ Zr =6.50g / cm 3 ) and niobium (ρ Nb =8.57g / cm 3 )element. Secondly, in order to further reduce the alloy density, we choose chromium with lower density (ρ Cr =7.22g / cm 3 ) elements and ultra-light aluminum (ρ Al =2.70g / cm 3 ) element to replace the niobium element in the alloy. Finally, in order to ensure the formation of a single-phase solid solution structure after alloying and avoid the generation of intermetallic compounds that damage the properties of the alloy, we have c...
Embodiment 1
[0059] The embodiment of the present invention provides a Ti 40 V 20 Zr 20 Nb 20 High-entropy alloys are composed of four elements: Ti, V, Zr and Nb. The relative atomic percentage of Ti atoms is 40%, the relative atomic percentage of V atoms is 20%, and the relative atomic percentage of Zr atoms is 20%. The relative atomic percentage of Nb atoms is 20%.
[0060] The Ti 40 V 20 Zr 20 Nb 20 The purity of the metal element raw materials selected for the high-entropy alloy is higher than 99.95 at%.
[0061] The Ti 40 V 20 Zr 20 Nb 20 The preparation method of high entropy alloy is as follows:
[0062] Step 1: Select four metal elements Ti, V, Zr, and Nb, and clean the high-purity metal particles twice with an ultrasonic cleaner for 2 minutes each time; 40 V 20 Zr 20 Nb 20 The atomic percentage of high-entropy alloys is accurately weighed four metal elements such as Ti, V, Zr, and Nb; the copper crucible of the vacuum arc melting furnace is polished with sandpaper ...
Embodiment 2
[0069] The embodiment of the present invention provides a Ti 40 V 20 Zr20 Nb 10 Cr 10 High-entropy alloys are composed of five metal elements: Ti, V, Zr, Nb and Cr. The relative atomic percentage of Ti atoms is 40%, the relative atomic percentage of V atoms is 20%, and the relative atomic percentage of Zr atoms is 20%, the relative atomic percentage of Nb atoms is 10%, and the relative atomic percentage of Cr atoms is 10%.
[0070] The Ti 40 V 20 Zr 20 Nb 10 Cr 10 The purity of the metal element raw materials selected for the high-entropy alloy is higher than 99.95 at%.
[0071] The Ti 40 V 20 Zr 20 Nb 10 Cr 10 The preparation method of high entropy alloy is as follows:
[0072] Step 1: Select five metal elements of Ti, V, Zr, Nb and Cr, and clean the high-purity metal particles twice with an ultrasonic cleaner for 2 minutes each time; 40 V 20 Zr 20 Nb 10 Cr 10 The atomic percentage of high-entropy alloys is accurately weighed five metal elements Ti, V, Zr, ...
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