Electrolytic polishing solution and electrolytic polishing process for titanium alloy EBSD sample

An electrolytic polishing and titanium alloy technology, which is applied in the field of electrolytic polishing liquid and electrolytic polishing technology, can solve the problems of poor calibration rate stability of polishing technology, not easy to prepare, complicated components, etc., and achieve easy preparation and storage, bright and clean surface, The effect of bright and clean surface

Pending Publication Date: 2022-03-01

辽宁增材制造产业技术研究院有限公司

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AI-Extracted Technical Summary

Problems solved by technology

With the deepening of the research, the electron backscatter diffraction (EBSD) technique used to study the crystallographic orientation and texture is more and more favored by scientific research. Compared with the transmission electron microscope technique, its sample preparation is relatively easy, but Since EBSD only occurs on the shallow surface layer of the sample surface, it is very sensitive to the stress layer on the surface, requi...

Abstract

The invention discloses an electrolytic polishing solution and an electrolytic polishing process for a titanium alloy EBSD sample, and belongs to the technical field of titanium alloy surface treatment.The electrolytic polishing solution comprises, by mass, 4-6 parts of perchloric acid, 30-40 parts of n-butyl alcohol, 45-55 parts of methyl alcohol and 9-11 parts of a hydrogen peroxide solution; the electrolytic polishing technology comprises the steps that abrasive paper grinding, mechanical polishing and electrolytic polishing are sequentially carried out, after electrolytic polishing is finished, a titanium alloy sample is put into a reagent of absolute ethyl alcohol to be washed, then ultrasonic waves are used for cleaning, and finally the surface of the sample is blow-dried through an air duct and properly stored. The electrolytic polishing solution is wide in material source, low in cost and simple to prepare, a stress layer and an oxide layer on the surface of the titanium alloy can be effectively removed, and the polished surface is bright and clean; the polishing process is easy to operate, high in calibration rate, stable in effect and convenient to widely popularize.

Application Domain

Material analysis using wave/particle radiationPreparing sample for investigation

Technology Topic

GrindingEmery paper +7

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Examples

Experimental program(3)

Example Embodiment

[0025] Example

[0026] In this example, there is a surface grinding polishing treatment of the arc 3D printing state Ti-6Al-4V titanium alloy, including the following steps:

[0027] (1) After the tannium alloy samples cut, the tannin alloy samples are inserted after 240 #, 400 #, 600 #, 800 #, 1000 #, 1200 #, 1500 #, 2000 #, 3000 #, 5000 # sandpaper for mechanical grinding; And each of the other sanding samples is rotated 90 °, ensuring that the previous layer is covered;

[0028] (2) The mechanically polished titanium alloy sample will be polished on the polishing machine, the speed is adjusted to 300r / min, and the pre-formulated SiO containing a small amount of hydrogen peroxide is kept in the process of polishing. 2 Suspension; as the polishing process is carried out, the speed is gradually adjusted to 100R / min until the light shining mirror is thrown, and then carefully remove the inlay on the titanium alloy sample to prevent the lens of the lens;

[0029] (3) Electrolytic polishing of the mechanical polished titanium alloy specimen is performed using a pre-formulated electrolyte polishing liquid, including the following components of the following content: 50 ml of hydrochloric acid, 350 ml n-butanol, 500 ml methanol And 100ml hydrogen peroxide solution, the electrolysis polishing treatment specifically includes the steps of:

[0030] (3-1) Pour the electrolytic polishing liquid into the beaker, the volume of the electrolytic polishing fluid depends on the size of the sample, which is fully immersed in the sample, and places the beaker into a pot of liquid nitrogen;

[0031] (3-2) is connected to the negative electrode of the DC power supply with the stainless steel sheet, and is immersed in a beaker with electrolyte polishing fluid;

[0032] (3-3) The nail polish will be applied to the surface of the electrolytic polishing to prevent electrothermation, and then the titanium alloy sample is an anode, and the puzzle clamping sample is connected to the positive electrode of the DC power source, the voltage of the DC power supply From 25V, the temperature of the electrolyzo-polished liquid was controlled by controlling the addition of liquid nitrogen at -25 ° C, then electrolyte polishing, the surface of the titanium alloy sample required to polish the surface of the stainless steel sheet in electrolytic polishing fluid; electrolysis process Controlled around 2A, polishing time control at 10s;

[0033] (4) After the electrolysis polishing, the titanium alloy sample is taken out, and the flushing of anhydrous ethanol is placed, and the polishing liquid attached to the surface is cleaned; then put it in the ultrasonic cleaning device for further cleaning, and finally used The wind cylinder blows the surface of the titanium alloy sample and stored properly.

[0034] The EBSD system using the NOVA 400nano-SEM field emission scanning electron microscope tests the Ti-6Al-4V titanium alloy sample passed by surface polishing polishing treatment, and the tie image is obtained, and the orientation image of the titanium alloy is obtained. figure 1 and figure 2 Disted, where figure 1 3000X orientation imaging diagram for this titanium alloy, figure 2 For the titanium alloy, 500X orientation imaging diagram.

Example Embodiment

[0035] Example 2

[0036] The present embodiment differs from the first embodiment in that:

[0037] In step (2), with the polishing process, the speed is gradually adjusted to 130R / min until the light shining surface is thrown;

[0038] In step (3), each of the sub-electrolyte polishing fluid includes 40 ml of hydrica chloric acid, 300 ml n-butanol, 550 ml of methanol and 110 ml hydrogen peroxide solution;

[0039] In step (3-3), the voltage of the DC power supply is adjusted to 26V, and the temperature of the electrolytic polishing fluid is controlled at 0 ° C; the current is controlled in the electrolysis process at 1.5a, and the polishing time is controlled at 15S.

[0040] Other as in Example 1.

Example Embodiment

[0041] Example 3

[0042] The present embodiment differs from the first embodiment in that:

[0043] In step (2), as the polishing process is performed, the speed is gradually adjusted to 150R / min until the light shining surface is thrown;

[0044] In step (3), each of the sub-electrolyte polishing fluid includes 60 ml of hydrochloric acid, 400 ml n-butanol, 450 ml of methanol and 90 ml of hydrogen peroxide solution;

[0045] In step (3-3), the voltage of the DC power supply is adjusted to 28V, and the temperature of the electrolytic polishing fluid is controlled at 25 ° C; the current is controlled at 1.8a in the electrolysis process, and the polishing time is controlled at 5S.

[0046] Other as in Example 1.

PUM

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

low cost
Extensive sources of materials

Method, apparatus and article for microfluidic control via electrowetting, for chemical, biochemical and biological assays and the like

InactiveUS7163612B2low cost

Owner:KECK GRADUATE INST OF APPLIED LIFE SCI

Electrolytic polishing solution and electrolytic polishing process for titanium alloy EBSD sample

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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