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应用文章
Obtaining surface maps of elastic modulus and hardness has been a persistent goal of the nanoindentation community. One proffered solution is to infer properties from an AFM-like scan of the surface. This technique, which is sometimes called “modulus mapping,” has subtle but significant limitations. Under many practical circumstances, surface roughness and incipient plasticity compromise the determination of contact area and thus elastic modulus. Further, for “modulus mapping” to work, the contact must be elastic, but this requirement excludes “hardness mapping,” because a hardness test requires causing plasticity in the material.
Keysight Technologies, Inc. Express Test option for the G200 NanoIndenter offers a comprehensive solution for mechanical properties mapping. Express Test implements traditional indentation testing in a revolutionary way in order to achieve unprecedented testing speeds. Express Test performs one complete indentation cycle per second, including approach, contact detection, load, unload, and movement to the next indentation site. Thus, Express Test can be used to create true surface maps of elastic modulus and hardness, simply by performing a high-speed array of indents. In this application note, Express Test is used to map out the hardness and elastic modulus of fiberglass.
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