Learning nugget: Metallography

SUMMARY:

Metallography is the branch of metallurgy that studies the internal structure of metals and alloys through the observation and analysis of their microstructure. This discipline is an indispensable tool for the manufacturing and production of materials. Metallography is useful for the research and development of new materials, as well as for solving quality problems such as preventing failures and defects during use.

Proper sample preparation is essential for the observation and analysis of the microstructure of metals and alloys. The sample preparation process involves several stages, including cutting, grinding, polishing, etching, and cleaning.

Once the samples are prepared, the microstructure of metals and alloys is studied using observation and analysis techniques in optical and electron microscopes. These techniques allow the internal structure of materials to be visualized and analyzed.

Optical microscopy is the most commonly used technique; electron microscopy is a more advanced technique. There are two types of electron microscopes: the scanning electron microscope (SEM) and the transmission electron microscope (TEM).

Microstructure analysis allows the determination of the mechanical and physical properties of materials. This analysis includes observing the morphology of the microstructure, determining the quantity and distribution of phases, measuring phase dimensions, and determining their chemical composition.

INDEX:

1. METALLOGRAPHIC PREPARATION
2. PHASE IDENTIFICATION
3. ANALYSIS MEDIA

(*) This training session dedicated to metallography is part of the “Introduction to Iron Casting” series, which consists of 13 short videos lasting between 15 and 40 minutes.