A method for preparing multi-oriented mesoscopic tensile samples based on femtosecond laser processing

A femtosecond laser processing and sample preparation technology, applied in the field of multi-oriented mesoscopic tensile sample preparation, can solve the problem that the intrinsic properties of the material cannot be well reflected, the sample size cannot meet the mechanical experiments, processing efficiency and cost constraints, etc. problems, to achieve the effect of reducing processing costs, shortening time-consuming, and improving processing efficiency

Active Publication Date: 2021-11-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of the sample preparation method, the size of the prepared nanostructured material will change greatly. When performing a macroscopic tensile test on it, the sample size cannot meet the mechanical experiments of different cross-sections and different orientations on it, so it is very difficult. It is difficult to obtain the intrinsic mechanical behavior of materials in all directions
When conducting micromechanical experiments, FIB is mostly used to prepare compressed micropillars or tensile samples in the shape of dog bones. However, due to the limitation of FIB processing efficiency and cost, the processed samples are usually <10μm, and samples of this size are generally accompanied by size effect, so the final experimental data cannot reflect the intrinsic properties of the material well

Method used

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  • A method for preparing multi-oriented mesoscopic tensile samples based on femtosecond laser processing
  • A method for preparing multi-oriented mesoscopic tensile samples based on femtosecond laser processing
  • A method for preparing multi-oriented mesoscopic tensile samples based on femtosecond laser processing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1: Cut a thin slice with a thickness of 1mm on the TD-ND cross-section of the nanosheet nickel sample with a wire cutting device, and use water, ethanol, and acetone to clean the thin slice ultrasonically in order to remove residual stains on the sample surface;

[0030] Step 2: Use #600, #800, #1200, #2000, #4000 sandpaper to mechanically thin the slices obtained in step 1 in turn. During the grinding process, do not apply too much force and add a small amount of water continuously to reduce grinding The heat generated in the process affects the sample. Use the cross method to uniformly thin both sides of the sheet until the thickness is reduced to 50 μm, and there is no obvious scratch on the surface of the sheet. Once again, the thinned sample was ultrasonically cleaned with water, ethanol, and acetone to remove residues on the surface of the sample;

[0031] Step 3: Glue both ends of the clean paper to the glass slide, and place the thin slice obtained in Step...

Embodiment 2

[0037] Step 1: Cut a thin slice with a thickness of 1mm on the TD-ND cross-section of the nanosheet nickel sample with a wire cutting device, and use water, ethanol, and acetone to clean the thin slice ultrasonically in order to remove residual stains on the sample surface;

[0038] Step 2: Use #600, #800, #1200, #2000, #4000 sandpaper to mechanically thin the slices obtained in step 1 in turn. During the grinding process, do not apply too much force and add a small amount of water continuously to reduce grinding The heat generated in the process affects the sample. Use the cross method to uniformly thin both sides of the sheet until the thickness is reduced to 50 μm, and there is no obvious scratch on the surface of the sheet. Once again, the thinned sample was ultrasonically cleaned with water, ethanol, and acetone to remove residues on the surface of the sample;

[0039] Step 3: Glue both ends of the clean paper to the glass slide, and place the thin slice obtained in Step...

Embodiment 3

[0045] Step 1: Cut a thin slice with a thickness of 1mm on the TD-ND cross-section of the nanosheet nickel sample with a wire cutting device, and use water, ethanol, and acetone to clean the thin slice ultrasonically in order to remove residual stains on the sample surface;

[0046] Step 2: Use #600, #800, #1200, #2000, #4000 sandpaper to mechanically thin the slices obtained in step 1 in turn. During the grinding process, do not apply too much force and add a small amount of water continuously to reduce grinding The heat generated in the process affects the sample. Use the cross method to uniformly thin both sides of the sheet until the thickness is reduced to 50 μm, and there is no obvious scratch on the surface of the sheet. Once again, the thinned sample was ultrasonically cleaned with water, ethanol, and acetone to remove residues on the surface of the sample;

[0047] Step 3: Glue both ends of the clean paper to the glass slide, and place the thin slice obtained in Step...

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Abstract

The invention is a method for preparing a multi-orientation mesoscopic tensile sample based on femtosecond laser processing. In this method, wire cutting equipment is used to cut the required sample thin slices, and the thin slices are mechanically thinned with polishing sandpaper. The geometric shape of the stretched sample is processed by laser. After the processing is completed, the ion precipitation on the surface of the sample is removed by a dust collector and cleaned with a solution. After cleaning, the sample is electropolished to obtain a multi-oriented mesoscopic stretched sample. Compared with the existing sample preparation method, the preparation method of the present invention not only has high speed and low cost, but also can meet the requirement of microscopic tensile test for materials with small size and multiple orientations.

Description

technical field [0001] The invention belongs to the field of preparation of multi-orientation mesoscopic tensile samples, in particular to a method for preparing multi-orientation mesoscopic tensile samples based on femtosecond laser processing. Background technique [0002] In recent years, ultra-fine crystal and nanocrystalline materials have been prepared by SPD, SMAT, ARB and other methods, which have excellent physical, mechanical and chemical properties that are incomparable to many traditional materials. Without changing the chemical composition of the metal, the yield strength and tensile strength of nanostructured metals are much higher than those of coarse-grained materials, even dozens of times higher than that of coarse-grained materials. [0003] At present, the research on the mechanical behavior of materials is more concentrated on conventional macroscopic mechanical experiments and microscopic mechanical experiments. However, due to the limitation of the sam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/32G01N1/34
CPCG01N1/28G01N1/286G01N1/32G01N1/34G01N2001/2866G01N2001/2886
Inventor 尤泽升付浩王浩鲍伟康包晨杰
Owner NANJING UNIV OF SCI & TECH
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