What is metallography and why is it used?

What is metallography and why is it used?

Metallography is the study of the microstructure of all types of metallic alloys. It can be more precisely defined as the scientific discipline of observing and determining the chemical and atomic structure and spatial distribution of the grains, constituents, inclusions or phases in metallic alloys.

What are the 5 steps in metallography?

In sequence, the steps include sectioning, mounting, course grinding, fine grinding, polishing, etching and microscopic examination. Specimens must be kept clean and preparation procedure carefully followed in order to reveal accurate microstructures.

What is metallography techniques?

Metallography is the art of embedding a specimen in resin and preparing it to reveal the microstructure of the materials. Specimens are prepared in this manner for analyzes under optical microscopes, scanning electron microscopes (SEM) and Electron Probe Micro-Analysis (EPMA).

What are the information expected from metallography?

Metallography can be performed using optical microscopy, SEM, and TEM to capture microstructural information such as grain size, grain shape, crystal texture, dislocation density, alloy segregation, cold work, and porosity.

What is metallography of Steel?

Metallography of stainless steels is an important part of the overall quality control process in many production environments. The main metallographic tests are: Grain size measurement. Investigation of general structure, including the content of martensite, ferrite, perlite or austenite.

What is metallography and metallographic microscopy?

Metallography is the study of the physical structure and components of metals, typically using microscopy. The surface of a metallographic specimen is prepared by various methods of grinding, polishing, and etching. After preparation, it is often analyzed using optical or electron microscopy.

What are the methods of metallographic examination?

Metallographic Method

• Material Removal.
• Eutectics.
• Microstructure.
• Scanning Electron Microscopy.
• Tensile Test.
• X-Ray Diffraction.
• Backscatter.
• Electron Microscope.

What is grinding in metallography?

Metallographic grinding is one of the process steps in mechanical sample preparation for subsequent microscopic examination. The principle is based on the fact that abrasive particles in successively finer grain sizes are used to remove material from the surface until the desired result is obtained.

What is etching in metallography?

Etching Is a Chemical or Electrolytic Process Used after Metallographic Grinding and Polishing Procedures. Etching Enhances the Contrast on Surfaces in Order to Visualize the Microstructure or Macrostructure.

What is metallographic examination?

Metallographic Testing of Materials to Verify Against Product Requirements or for Research and Development. Metallographic testing uses standardized test methods to reveal and determine macro- and micro scale visual characteristics of a material.

How do you prepare a sample for metallographic observation?

Proper preparation of metallographic specimens is a key step to determine the accurate microstructure of a material and often requires sectioning, mounting, course grinding, fine grinding, polishing, etching and microscopic examination.

What is metallographic testing in welding?

The study of a material’s microstructure. Metallographic examinations are generally performed by using optical microscopes to analyzing micrographs, and provide insight into the past and future performance of base materials, parts, and experimental alloys.