Precipitation strengthening high-entropy alloy component design and preparation method based on diffusion multi-section technology
A high-entropy alloy and precipitation strengthening technology, applied in the field of high-entropy alloys, can solve the problems of accelerating the development of precipitation-strengthening high-entropy alloys, and achieve the effects of comprehensive strength and ductility, material saving, and short process.
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Embodiment 1
[0063] Example 1: Preparation of Diffusion Multi-Parts
[0064] Step 1: Use sandpaper and ethanol ultrasonic cleaning to remove impurities such as scale on the raw materials; weigh 8g of Co, Cr, Fe, Ni, and X raw materials according to the equiatomic ratio; prepare the composition as CoCrFeNiX by vacuum non-consumable arc melting (X 1 = V, X2 = Mo, X 3 = Cu, X 4 = Ti, X 5 = Al, X 6 = Nb, X 7 = Hf, X 8 = Ta, X 9 =Si) For alloy ingots based on FCC, each smelting time is 1min, repeated smelting 5 times, and taken out after cooling; using wire electric discharge cutting to obtain CoCrFeNiX block ingots of a certain size, grinding and cleaning.
[0065] Step 2: Prepare nickel sheath and sheath cover. Press the CoCrFeNiX alloy block into figure 1 Assembled into the package. The cover is welded to the upper and lower ends of the cover by vacuum electron beam welding. Hot isostatic pressing is then used to bring the alloy blocks into intimate contact. Among them, the weldi...
example 2
[0068] Example 2 prepares Co x1 Cr x2 Fe x3 Ni x4 Al x5 Ti x6 Precipitation strengthened high entropy alloy
[0069] Step 1: According to the composition curve of CoCrFeNiAl-CoCrFeNiTi diffusion couple (such as Figure 4 As shown in a), the composition of the solid solution region of the diffusion layer changes from Co 24 Cr 20 Fe 23.4 Ni 25.5 Al 5.4 Ti 1.7 Change to Co 23 Cr 22 Fe 23.4 Ni 21.6 Al 0.4 Ti 9.6 , can be used as Co x1 Cr x2 Fe x3 Ni x4 Al x5 Ti x6 Candidate constituents for precipitation strengthening high-entropy alloys. As one of the verification cases, the composition points on the curve where Al and Ti have the same value are selected here, and the chemical formula is Co 24 Cr 20.9 Fe 25.1 Ni 24 Al 3 Ti 3 , where x1, x2, x3, x4, x5, and x6 are the atomic percentages of the corresponding elements. Due to errors in instrument measurement, the values on the measured composition curves are corrected for ±1 error, so 23≤x1≤25, 20≤ x2...
example 3
[0073] Example 3, preparation of Co based on diffusion couple technology y1 Cr y2 Fe y3 Ni y4 Cu y5 Ti y6 Precipitation strengthened high entropy alloy
[0074] Step 1: According to the composition curve of CoCrFeNiCu-CoCrFeNiTi diffusion couple (such as Figure 4 As shown in b), the composition of the solid solution region of the diffusion layer changes from Co 22.4 Cr 19.6 Fe 23.5 Ni 23 Cu 10 Ti 1.5 Change to Co 22.2 Cr 20.8 Fe 22.7 Ni 22.9 Cu 0.8 Ti 10.6 , can be used as Co y1 Cr y2 Fe y3 Ni y4 Cu y5 Ti y6 Candidate constituents for precipitation strengthening high-entropy alloys. As one of the verification cases, the composition points on the curve where Cu and Ti have the same value are selected here, and the chemical formula is Co 22.8 Cr 19 Fe 23.5 Ni 24.7 Cu 5 Ti 5 , where y1, y2, y3, y4, y5, and y6 are the atomic percentages of the corresponding elements. Due to errors in instrument measurement, the values on the measured composition cur...
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