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A technique for assessing a material’s hardness on a small scale is microindentation hardness testing, also known as microhardness testing.
At loads ranging from a few grams to one kilogramme, the material is impressed using a precise diamond indenter. A diamond indenter is used to make an indentation on the specimen during a microhardness test after applying a load P. (Figure 5.5).
A calibrated optical microscope is used to quantify the size of the resulting indentation, and the mean stress placed beneath the indentation is used to determine the hardness.
Testing for microhardness involves applying loads greater than 1 kg, or around 10 Newton (N), is frequently applied to thin specimens, plated surfaces, thin films, or smaller samples.
Vickers and Knoop hardness tests are the two most popular microhardness methods.
The Global Microindentation Hardness Tester market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
Micro-hardness testing enables minute scale measurements of a material’s hardness. A fully automated system with quick and accurate placement in relation to the sample is the Qness Q60 A+ microindenter.
Three distinct magnification lenses (10X, 40X, and 65X) and three indenters (Vickers, Knoop, and Brinell) are included in the apparatus, which makes it easier to test the hardness of a variety of materials.
With the Qness CAS sample holders, several samples with different heights and tilts can be imprinted simultaneously.
Additionally, the indenter can be customised to the test sample’s contour in order to precisely test different material sections (such as layers).
Additionally, users can use the 2D/3D mapping tool to determine the hardness distribution along a segment or entire plane of the test sample.
Plot illustrates the mean and standard deviation of the HV 30 hardness test for variously polished surfaces of 316 stainless steel.
The most accurate result is obtained after the stage with 0.3 micron colloidal silica (i.e. closest to the accepted 316 hardness value).
The samples polished with 1200 grit SiC sandpaper and 0.3 micron colloidal silica have similar measurement precision, as shown by the error bars displaying the standard deviation, and are much better than the error for the 600 grit sample.0.3 m colloidal silica was used to polish the sample, which revealed the array of more than 200 Vickers indents.
The HV 30/10 test used 0.3 kg of force and a 10 s indent time to create the micro indentations.
