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Mounting of specimens is usually necessary to allow them to be handled easily. It also minimizes the amount of damage likely to be caused to the specimen itself. The mounting material used should not influence the specimen as a result of chemical reaction or mechanical stresses. It should adhere ... Read More
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2024 Dongguan International Machine Tool Exhibition (DME) Exhibition time: November 11~November 14, 2024 Exhibition location: Guangdong Modern International Exhibition Center, China-Guangdong, Once a year, exhibition area: 700,000 square meters, exhibition visitors: 700,000 people, the number of ... Read More
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When cutting a specimen from a larger piece of material, care must be taken to ensure that it is representative of the features found in the larger sample, or that it contains all the information required to investigate a feature of interest. One problem is that preparation of the specimen may ... Read More
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Ultrasonic Method to Measure Thickness ultrasonic instruments with a graphical LCD illustrate substrate roughness by displaying wide "peaks" when the substrate is rough and narrow "peaks" when it is smooth. This type of display helps in measuring coating systems in which the number of layers is ... Read More
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FILM & TAPE EXPO SHENZHEN 2024 FILM & TAPE SHENZHEN exhibition will be held at Shenzhen International Convention and Exhibition Center (Bao'an New Hall) from November 6 to 8, 2024. As a vane exhibition in the field of film, tape, coating and die-cutting, it has been forging ahead for 15 years and is ... Read More
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What is Eddy Current Technique? The most common use of eddy current measurement is for non-conductive coatings over non-ferrous metals such as anodize or paint over aluminum. This technique allows for an accurate reading with even very thin materials through elimination of the base effect. How eddy ... Read More
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Differential Interference Contrast (DIC), also known as Nomarski Contrast, helps to visualize small height differences on the specimen surface, thus enhancing feature contrast. DIC uses a Wollaston prism together with a polarizer and analyzer whose transmission axes are perpendicular (crossed at 90°... Read More
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The Difference Between Brightfield and Barkfield Brightfield (BF) illumination is the most common illumination technique for metallographic analysis. In incident BF, the light path comes from the light source, passes through the objective lens, is reflected off the surface of the specimen, returns ... Read More
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Rockwell Indentation Spacing The hardness of the material immediately surrounding a previously made indentation will usually increase due to the induced residual stress and work hardening caused by the indentation process. If a new indentation is made in this affected material, the measured hardness ... Read More
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Two major reasons to do hardness testing for metal materials: a, to verify the heat treatment of a part and to determine if a material has the properties necessary for its intended use; b, to determine the characteristics of materials whether qualified in industrial and R&D applications. Features of ... Read More
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