What is the best method to prepare a sample for EBSD analysis of 410 martensitic stainless steel? samples were quenched and partitioned and the structure consist of austenite + mertensite, ...
The best method to prepare a sample for EBSD analysis of 410 martensitic stainless steel is to mechanically polish the sample to a high degree of surface finish, typically below 0.2 microns. This is because EBSD analysis is sensitive to surface roughness, and a smooth surface is necessary for accurate analysis.
After polishing, the sample should be cleaned using a solvent or detergent to remove any contaminants or debris. This is important because any contaminants on the surface of the sample can interfere with the EBSD analysis.
Once the sample is clean and smooth, it should be coated with a thin layer of conductive material, such as gold or palladium, using an electrodeposition or sputter coating method. This is necessary to enable the EBSD detector to detect the diffracted electrons from the sample.
Finally, the sample should be mounted on a stage and aligned with the EBSD detector according to the specific requirements of the analysis. This will ensure that the sample is positioned correctly for accurate EBSD analysis of the 410 martensitic stainless steel.
Steels or any other metallic alloys don't have to be coated for EBSD, actually, in my opinion shouldn't be coated. Coating will make diffraction patterns worse. Coating can be good for nonconductive materials. Metals are conducting well enough when connected to the sample holder with conductive paint.
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