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A kind of method for preparing titanium and titanium alloy ebsd sample

A titanium alloy and sample technology, which is applied in the field of preparation of titanium and titanium alloy EBSD samples, can solve the problems of short polishing time, low calibration rate, and repeated attempts to avoid brown spots, eliminate dark areas, and maintain temperature.

Active Publication Date: 2022-02-22
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for different materials, the polishing parameters not only need repeated trials, but also adjust the voltage, position and inclination angle of the electron gun to control the polishing area and polishing time, and after long-term polishing, the surface will produce embossment and poor flatness, which is not conducive to subsequent micro-processing
Electropolishing is a common method for processing EBSD samples. The polishing time is short, the stress relief layer is obvious, and the surface is smooth and smooth. However, it has strict requirements on the electrolyte and various parameters. Usually, the calibration rate is low, about 80%, which is not conducive to data analysis.

Method used

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  • A kind of method for preparing titanium and titanium alloy ebsd sample
  • A kind of method for preparing titanium and titanium alloy ebsd sample
  • A kind of method for preparing titanium and titanium alloy ebsd sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Polishing treatment on the surface of Ti-32MO alloy 8×8mm sample

[0030] Step 1. Mechanically grind the surface of the sample to 800# sandpaper step by step;

[0031] Step 2, first put the electrolytic cell 2 into the cooling tank 1, and add a volume ratio of HCLO into the electrolytic cell 2 4 :CH 3 COOH=1:9 polishing liquid, add normal temperature water into the cooling tank 1 at the same time as the cooling liquid, then put the stainless steel plate 3 into the electrolytic tank 2, and connect it to the negative pole of the power supply 5, connect the titanium fixture 4 to the positive pole of the power supply 5, adjust The voltage of the power supply 5 is 50V;

[0032] Step 3, use the titanium fixture 4 to clamp the alloy sample treated in step 1, and put it into the polishing solution, adjust the distance between the alloy sample and the stainless steel plate 3 to 10, make the current of the power supply 5 0.8A, start polishing, polishing Shake the titanium fixt...

Embodiment 2

[0036] Polishing treatment on the surface of Ti-10V-2Fe-3Al alloy 10×10mm sample

[0037] Step 1. Mechanically grind the surface of the sample to 800# sandpaper step by step;

[0038] Step 2, first put the electrolytic cell 2 into the cooling tank 1, and add a volume ratio of HCLO into the electrolytic cell 2 4 :CH 3 COOH=1:9 polishing liquid, add normal temperature water into the cooling tank 1 at the same time as the cooling liquid, then put the stainless steel plate 3 into the electrolytic tank 2, and connect it to the negative pole of the power supply 5, connect the titanium fixture 4 to the positive pole of the power supply 5, adjust The voltage of the power supply 5 is 50V;

[0039] Step 3, use the titanium clamp 4 to clamp the alloy sample treated in step 1, and put it into the polishing solution, adjust the distance between the alloy sample and the stainless steel plate 3 to 13cm, make the current of the power supply 5 0.9A, start polishing, polishing Shake the tita...

Embodiment 3

[0043] Polishing treatment on the surface of Ti-6Al-3Nb-2Zr-1Mo alloy 15×15mm sample

[0044] Step 1. Mechanically grind the surface of the sample to 800# sandpaper step by step;

[0045]Step 2, first put the electrolytic cell 2 into the cooling tank 1, and add a volume ratio of HCLO into the electrolytic cell 2 4 :CH 3 COOH=1:9 polishing liquid, add normal temperature water into the cooling tank 1 at the same time as the cooling liquid, then put the stainless steel plate 3 into the electrolytic tank 2, and connect it to the negative pole of the power supply 5, connect the titanium fixture 4 to the positive pole of the power supply 5, adjust The voltage of the power supply 5 is 50V;

[0046] Step 3. Utilize the titanium clamp 4 to clamp the alloy sample treated in step 1, and put it into the polishing solution, adjust the distance between the alloy sample and the stainless steel plate 3 to be 15cm, make the current of the power supply 5 be 1A, and start polishing. Shake the...

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Abstract

The invention discloses a method for preparing titanium and titanium alloy EBSD samples, comprising: pretreating the surface of the sample; Then put the stainless steel plate into the electrolytic cell and connect it to the negative pole of the power supply, connect the titanium clamp to the positive pole of the power supply, and finally adjust the power supply voltage; use the titanium clamp to clamp the processed sample, put it into the polishing solution, and adjust the power supply current. Start polishing, shake the titanium fixture during polishing; take out the sample for cleaning and drying, and finish polishing. The polishing time is short, and the polishing efficiency can be improved; the data collection and calibration rate of the EBSD experiment can reach more than 95%.

Description

technical field [0001] The invention belongs to the technical field of electrolytic polishing methods, and relates to a method for preparing titanium and titanium alloy EBSD samples. Background technique [0002] In recent years, Electron Backscattered Diffraction (EBSD) in scanning electron microscopy has developed into a powerful tool for rapid and accurate analysis of microstructure and texture in the field of materials. EBSD is mainly used in the measurement of crystal structure orientation, microtexture analysis, phase identification, twin analysis, strain and grain size measurement, and can correspond the crystal structure information with the microstructure morphology. Backscattered electrons generally occur in the depth range of tens of nanometers on the surface of the sample, so EBSD technology has high requirements on the surface of the sample, which needs to be smooth and bright without residual stress. The quality of the sample surface and the residual stress lay...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F3/26G01N1/32
CPCC25F3/26G01N1/32
Inventor 潘艳谭长生孙巧艳肖林
Owner XIAN UNIV OF TECH