EBSD Sample Preparation for Alloy Steel

EBSD (Electron Backscatter Diffraction) is the "microscopic lens" for alloy steel R&D and quality control! It precisely captures core information such as grain orientation, grain boundary characteristics, phase distribution, and dislocation density, revealing the correlation between microstructure and strength, toughness, and corrosion resistance. It provides direct evidence for optimizing rolling and heat treatment processes, and identifying failure risks — making it an essential tool for transitioning from "empirical development" to "precision control."

However, proper sample preparation is the prerequisite for successful EBSD — obtaining a flat, clean, and deformation-free sample surface. Mechanical polishing tends to introduce plastic deformation layers that mask the true microstructure; residual deformation layers, residual stress, or surface contamination can all cause a drastic drop in indexing rate. It is essential to strictly follow a combined process of "progressive mechanical grinding & polishing + vibratory polishing" to obtain high-resolution samples and reliable data.

The Trojan VP-430 Vibratory Polisher, as a powerful tool for sample preparation, can significantly improve EBSD Kikuchi pattern quality and boost work efficiency. This equipment is particularly suited for surface polishing of soft and ductile materials such as titanium, aluminum, pure copper and copper alloys, aluminum alloys, steel, and nickel-based alloys. It is truly a game-changer for EBSD sample preparation.

The following preparation procedure is provided for reference:

● Grind the sample flat using P400 metallographic abrasive paper;

● Fine grind using POS grinding disc + 9μm PD-WT polishing suspension;

● Polish using SC-JP polishing cloth + 3μm PD-WT polishing suspension;

● Polish using ZN-ZP polishing cloth + 50nm SO-T401 polishing suspension;

● Vibratory polish using ZN-ZP polishing cloth + 50nm SO-T401 polishing suspension.