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Preparation method of additive manufacturing aluminum-silicon alloy for EBSD test

An aluminum-silicon alloy and additive manufacturing technology, which is applied in the field of vibration polishing preparation of additively-manufactured aluminum-silicon alloys, and can solve the problems of difficult polishing effects of different components, affecting data collection, and inability to distinguish.

Pending Publication Date: 2020-11-24
GUOBIAO BEIJING TESTING & CERTIFICATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al-Si alloy structure includes eutectic structure and hypereutectic structure, in which hypereutectic aluminum-silicon structure is mostly composed of acicular silicon and primary silicon, due to the matrix aluminum phase and acicular silicon, primary silicon phase There is a large difference in composition, and it is difficult to obtain a good polishing effect when using electrolytic polishing technology and OPS technology to remove stress while different compositions are the same, which affects data collection; and the lattice structures of the aluminum phase and the silicon phase are both face-centered cubic (FCC), its lattice constant (aluminum: a=b=c=4.04; silicon: a=b=c=5.43) is very close, and it is difficult to analyze the EBSD phase; if the quality of the pattern is poor, the aluminum phase and The analysis of silicon phase is more likely to cause misjudgment or inability to distinguish
Therefore, when using EBSD technology to characterize the microstructure, how to eliminate the stress and obtain a bright detection surface through a suitable polishing process brings certain challenges to the characterization of the microstructure of the additively manufactured Al-Si alloy.

Method used

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  • Preparation method of additive manufacturing aluminum-silicon alloy for EBSD test
  • Preparation method of additive manufacturing aluminum-silicon alloy for EBSD test
  • Preparation method of additive manufacturing aluminum-silicon alloy for EBSD test

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Additive manufacturing of AlSi using wire cutting 5 Mg sample cut length × width × height is 5 × 5 × 5mm; use conductive mounting material, inlay the sample into a metallographic sample with a thickness of 10mm and a diameter of 25mm in a hot mounting prototype;

[0032] Mechanical grinding and polishing: The inlaid metallographic sample is subjected to 200#, 500#, 800#, 1200#, 2000#, 2400# multi-pass water grinding treatment, and finally polished with 1.5μm diamond polishing solution and cleaned with ethanol Blow dry to make the sample surface bright and free from dirt and oil stains;

[0033] Vibration polishing: Hold the polished metallographic sample with the sample holder, and pour the polishing solution into the polishing disc of the vibration polishing instrument. The polishing solution is silica sol polishing solution: deionized water = 8:2 (volume Ratio), wherein the silica sol polishing solution is the final polishing suspension of amorphous silica gel with a...

Embodiment 2

[0037] Additive manufacturing of AlSi using wire cutting 10 Mg sample cut length × width × height is 5 × 5 × 5mm; use conductive mounting material, inlay the sample into a metallographic sample with a thickness of 10mm and a diameter of 25mm in a hot mounting prototype;

[0038] Mechanical grinding and polishing: The inlaid metallographic sample is subjected to 200#, 500#, 800#, 1200#, 2000#, 2400# multi-pass water grinding treatment, and finally polished with 1.5μm diamond polishing liquid, and the polishing is completed The sample is washed and dried with ethanol, so that the surface of the sample is bright and free of dirt and oil stains;

[0039] Vibration polishing: clamp the polished sample with a special sample holder, pour the polishing solution into the polishing disc of the vibration polishing instrument, and the polishing solution is silica sol polishing solution: deionized water = 7:3 (volume Ratio), wherein the silica sol polishing solution is the final polishing...

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Abstract

The invention relates to a preparation method of an additive manufacturing aluminum-silicon alloy for an EBSD test, and belongs to the technical field of vibration polishing. The method comprises thefollowing steps: for a metallographic specimen formed by inlaying an aluminum-silicon alloy, firstly carrying out different passes of water grinding treatment by adopting abrasive paper from thick tothin, then carrying out polishing treatment by adopting a diamond polishing solution, and cleaning the polished specimen until the surface is bright; mixing the silica sol polishing solution with deionized water according to a volume ratio of greater than or equal to 3:2 to prepare a vibration polishing solution; and pouring the polishing solution into a vibration polishing machine, immersing theto-be-tested surface of the sample into the polishing solution, and carrying out vibration polishing. The method can be used for researching the microstructure and texture of an additive manufacturingAl-Six-Mg sample, has the advantages of being easy and convenient to operate, easy to control, good in effect and the like compared with electrolytic polishing and OPS mechanical polishing, and is suitable for additive manufacturing of two-phase or multi-phase alloy with a hard phase and a base body coexisting.

Description

technical field [0001] The present invention relates to a kind of additive manufacturing aluminum-silicon alloy (Al-Si) for EBSD test x -Mg) vibration polishing preparation method, which belongs to the field of vibration polishing technology. Background technique [0002] Aluminum silicon alloy (Al-Si x -Mg) has the characteristics of good wear resistance, good corrosion resistance, and high volume stability, and has become a material for the replacement of engine piston parts. Additive manufacturing is a new type of manufacturing technology based on the principle of discrete-stacking, using powder as raw material, directly stacking up and layer-by-layer through the three-dimensional data model of the part to directly prepare components. This technology does not require traditional tools and fixtures and multiple components. One processing procedure can quickly and precisely manufacture parts of any complex shape on one piece of equipment, thus realizing the "free manufact...

Claims

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Application Information

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IPC IPC(8): G01N1/32B24B1/00
CPCG01N1/32B24B1/00
Inventor 张丽民李聪何少卿杜志伟左玉婷
Owner GUOBIAO BEIJING TESTING & CERTIFICATION CO LTD