Sample preparation for tests such as the hardness test are critical when it comes to quality control, production, and engineering. Last month we went over the grinding and polishing of samples. Now we are going to explain the sectioning and mounting process of sample preparation. Sample Preparation – Sectioning and Mounting Explained. Sectioning The sectioning part of the sample preparation is where the sample is cut or “sectioned” off from the main material source. One of the most important aspects of sectioning is to not alter the microstructure or damage fracture features when cutting a specimen. If an abrasive saw... Continue reading
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Category: Polishing
In order to take proper measurements on a specimen that is being tested, such as a piece of material for a hardness test, proper sample preparation is a key step in order to get accurate data from the test. In sample preparation, you usually have the following steps: sectioning, mounting, coarse grinding, fine grinding, polishing, etching and examination. We are going to explain the grinding and polishing steps in sample preparation. Sample Preparation – Grinding and polishing explained. Grinding Grinding removes saw marks and levels and cleans the specimen surface. The goal at the end of grinding is to... Continue reading
Polishing is the process or achieving the smoothest surface or best possible planeness by removing any damage remaining from grinding steps. The ultimate goal is to produce scratch and deformation free samples that can satisfy testing and clients' needs. Polishing cloths of various materials will help you achieve this goal. Polishing cloths vary on two important dimensions. You need to consider the nap, or the height of the fiber, and the stiffness or resiliency of the fiber. For most applications, polishing cloths are used in conjunction with diamond suspensions, diamond pastes, and other powders and liquids of varying grain sizes.... Continue reading