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“Quality control for metals & alloys are critical to ensure structure integrity and reliability for the manufacturing use and consumer application…”
Major Steps: Sectioning and Cutting
Whatever the material is, samples need to be cut accordingly to the area of interest and for handling convenience. Some of cutting methods used are: Abrasive cutting, Diamond wafer cutting, Electric discharge machining (EDM), Fracturing, Thin microtome sectioning, Sawing, Shearing, Water jet cutting, etc. Note: It is important to reduce chances of microstructure damage to avoid producing false metallographic characterization analysis later. Mounting
After cutting into a small work pieces, it will be compressed in mounting moulds with thermoplastics – acrylics, ambient castable resins or thermoplastic glues. Which:
Grinding & Polishing
Grinding helps to prepare the cut surface or mount for metallographic examination by:
After the grinding process, polishing is done to create a clearer view of the surface on the object while removing minor scratches. Etching
Metallographic etching is a chemical technique used to highlight features of metals at microscopic levels. the specimen is covered or dipped into a protective layer of etching liquid (this varies from electrochemical, chemical, physical or cathodic vacuum).
Need advice on Metallographic Sample Preparation?
Mr. Samson Chong, Product Specialist (+6012-223 2576 - WhatsApp)
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Published : 26-Aug-2019