Figure 1
The image is a grayscale metallographic micrograph showing a polycrystalline microstructure composed of irregular, polygonal grains. Light gray regions form the majority of the field and represent individual grains, separated by darker gray to black interconnected boundary networks. Several grains contain faint internal contrast patterns, while numerous small dark speckles are scattered throughout the microstructure, indicating fine pores, precipitates, or etching artifacts. Grain shapes vary in size and geometry, with curved and straight boundaries forming a continuous network across the image. Some darker regions appear clustered along grain boundaries and triple junctions, emphasizing intergranular contrast. At the bottom right corner, a red scale bar labeled “10 micrometers” provides spatial reference.Metallographic analysis of Q235 steel. Source(s): Authors’ own work