Analytical method for quantitative evaluation of alloy element segregation in high-temperature alloy
A technology for quantitative evaluation of alloy elements, applied in the analysis of materials, material analysis using wave/particle radiation, and measuring devices, etc., can solve problems such as unintuitive results, limited element content, and inability to display element distribution positions, etc., to achieve evaluation Reasonable method and wide application range
Active Publication Date: 2016-07-27
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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However, this method can only obtain the composition of the precipitated phase, and cannot show the distribution position of each element in the sample.
In the "High Temperature Aging Precipitated Phases of INCONEL617 Alloy" published in Volume 45, Issue 1 of "China Electric Power", Guo Yan et al. mainly used transmission electron microscope and scanning electron microscope to study the precipitated phases. segregation
[0005] It can be seen from the above-mentioned literature and patents that the existing analytical segregation technology needs standard samples, and has limitations on element content, and the results are not intuitive; the distribution of each element in the sample is not clear, etc.
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[0020] Below in conjunction with embodiment further illustrate the present invention.
[0021] 1) Thermally mount the 825 alloy sample, use a polishing machine to perform rough grinding with 180#, 800# sandpaper, fine grinding with 1200#, 1500# sandpaper, and then pass through 5μm, 1μm diamond polishing agent, and polish until there is no obvious scratch , quickly washed in absolute ethanol, and dried with a hair dryer;
[0022] 2) Dilute copper sulfate, hydrochloric acid, and distilled water according to m CuSO4 :V HCl :V H2O = Prepare the corrosion solution at a ratio of 1:5:5, soak the sample in the solution, and keep the polished surface facing the side wall of the container, observe the surface state of the sample, take out the sample after 2.5 minutes, wash it quickly in absolute ethanol, and use a hair dryer Blow dry, and observe the distribution of the precipitated phase under the scanning electron microscope, such as figure 1 As shown, the white particles are prec...
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The invention discloses an analytical method for quantitative evaluation of alloy element segregation in high-temperature alloy. The method includes: an energy dispersive spectrometer for determining main components of a grain boundary precipitate; by a spectrum area scanning function of an electronic probe, distinguishing grain boundary distribution and transgranular distribution of corresponding elements; extracting data of an element area profile; analyzing the data, calculating grain boundary and transgranular element concentration distribution coefficients and drawing a graph of relation to finally realize quantitative evaluation of alloy element segregation in high-temperature alloy. By the analytical method for quantitative evaluation of alloy element segregation in high-temperature alloy, quantitative distinction of distribution of alloy elements at different grain boundary and transgranular positions of the high-temperature alloy can be realized without consumption of a great quantity of standard samples, and extensive application range and evaluation reasonability are realized.
Description
technical field [0001] The invention belongs to the technical field of component analysis of high-temperature alloy materials, and relates to an analysis method for quantitatively evaluating the segregation of alloy elements in high-temperature alloys. Background technique [0002] In order to improve the high-temperature strength, corrosion resistance and structural stability of alloys, the research on superalloys tends to diversify the types and increase the number of alloying elements. Different alloying elements play different roles, such as solid solution strengthening, second phase strengthening and grain boundary strengthening and so on. The quantity, composition, size, distribution of various phases and the distribution of alloying elements at grain boundaries have a great relationship with the mechanical properties and corrosion resistance of superalloys. Therefore, the segregation law of alloying elements in superalloys is studied and predicted The state of segreg...
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IPC IPC(8): G01N23/225
CPCG01N23/2251
Inventor 洪慧敏张珂胡显军吴园园
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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