Austenite alloy EBSD sample preparation method

An austenite and alloy technology, applied in the field of electron microscope sample preparation, can solve the problems of high energy consumption of low-temperature polishing, environmental pollution by electrolyte, complicated preparation process, etc., and achieve the effect of shortening preparation time, reducing preparation links and reducing cost.

Inactive Publication Date: 2019-06-07
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The Kikuchi pattern obtained by the EBSD experiment requires the sample surface to be flat, clean, and free of strain layers, while the surface of the sample that is generally mechanically polished cannot meet the experimental needs
The national standard GBT19501 recommends the electrolytic polishing method for sampl

Method used

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  • Austenite alloy EBSD sample preparation method
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  • Austenite alloy EBSD sample preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the austenitic alloy EBSD sample in this embodiment includes austenitic alloy sample preparation, grinding, polishing, fine polishing, two-step ultrasonic treatment and drying process. The specific process steps are as follows:

[0022] (1) Sample preparation process: 316L austenitic stainless steel samples are prepared by wire electric discharge cutting;

[0023] (2) Grinding process: During the grinding process, 150-mesh, 400-mesh, 1000-mesh and 2000-mesh silicon carbide water abrasive paper is used to polish the sample four times, and the speed of the metallographic grinding and polishing machine is 300 rpm;

[0024] (3) Polishing process: during the polishing process, diamond polishing paste with a particle size of 2.5 μm, 1.5 μm and 0.5 μm is used to polish the sample three times, and the speed of the metallographic polishing machine is 400 rpm;

[0025] (4) Fine polishing process: After grinding and polishing, wash the surface with water,...

Embodiment 2

[0030] The preparation method of the austenitic alloy EBSD sample in this embodiment includes austenitic alloy sample preparation, grinding, polishing, fine polishing, two-step ultrasonic treatment and drying process. The specific process steps are as follows:

[0031] (1) Sample preparation process: Inconel 600 austenitic stainless steel samples are prepared by wire electric discharge cutting;

[0032] (2) Grinding process: During the grinding process, 80-mesh, 600-mesh, 800-mesh and 3000-mesh silicon carbide water abrasive paper was used to polish the sample four times, and the speed of the metallographic grinding and polishing machine was 400 rpm;

[0033] (3) Polishing process: During the polishing process, diamond polishing paste with a particle size of 3.5 μm, 1.0 μm and 0.5 μm is used to polish the sample for three times, and the speed of the metallographic polishing machine is 400 rpm;

[0034] (4) Fine polishing process: After grinding and polishing, wash the surface ...

Embodiment 3

[0039] The preparation method of the austenitic alloy EBSD sample in this embodiment includes austenitic alloy sample preparation, grinding, polishing, fine polishing, two-step ultrasonic treatment and drying process. The specific process steps are as follows:

[0040] (1) Sample preparation process: 304 austenitic stainless steel samples are prepared by WEDM;

[0041] (2) Grinding process: During the grinding process, 80-mesh, 400-mesh, 800-mesh and 2000-mesh silicon carbide water abrasive paper was used to polish the sample four times, and the speed of the metallographic grinding and polishing machine was 375 rpm;

[0042] (3) Polishing process: during the polishing process, diamond polishing paste with a particle size of 3.5 μm, 1.5 μm and 0.5 μm is used to polish the sample three times, and the speed of the metallographic polishing machine is 300 rpm;

[0043] (4) Fine polishing process: wash the surface with water after grinding and polishing, and then carry out the fine ...

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Abstract

The invention discloses an austenite alloy EBSD sample preparation method. The preparation method comprises austenite alloy sample preparation, grinding, polishing, fine polishing, two-step ultrasonictreatment and drying steps, wherein for the fine polishing step, in the fine polishing process, silica suspension liquid with particle size of 20-50nm is used, the rotation speed of a metallographical polishing machine is smaller than or equal to 100 turn/min, and fine polishing time is larger than or equal to 10 min; and for the two-step ultrasonic treatment step, the first ultrasonic treatmentstep is characterized by placing the samples in a 10%NaOH aqueous solution, which is 10-45 DEG C, for ultrasonic cleaning, the cleaning time being larger than or equal to 3 min. Compared with the national standard GBT19501, the method does not need the electropolishing process and does not need to purchase special equipment, thereby reducing preparation steps, making preparation simple and convenient and reducing cost; and the problems that an existing electropolishing method needs special equipment, is high in sample preparation cost and is long in polishing process exploration time, and electrolyte pollutes the environment and the like are overcome effectively.

Description

technical field [0001] The invention belongs to the field of preparation of electron microscope samples, and in particular relates to a preparation method of austenitic alloy EBSD samples. Background technique [0002] Austenitic alloys, including stainless steel and nickel-based alloys, are widely used as key structural materials in petroleum, chemical, nuclear power and other industrial sectors. The coupling effect of corrosion and complex stress in the service environment greatly increases the sensitivity of the material to environmental damage, and the grain boundary is the weak link of the material, which is prone to failure. [0003] The electron backscatter diffraction (EBSD) technique is based on the Kikuchi pattern formed by electrons acting on the inclined sample surface in the scanning electron microscope to determine the crystal structure, orientation and other information. It can be used to study the grain boundary characteristics of austenitic alloys and struc...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/32G01N1/34
Inventor 马成潘进魏浩罗扬安会龙孙力
Owner HEBEI IRON AND STEEL
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