Shot-Blast Particles

These are particles that are created by shot-blasting metal parts. Welding was being performed in an adjacent bay and is the source of weld debris. This view includes shot-blast created metal flakes, magnetite weld spheres, and fragments of iron heat-treat scale.

Transmitted Circular Polarized Light and Reflected Darkfield Illumination

Metal shot-blast tends to create thin flakes of metal as well as debris from the surface of the material being processed.