Adding the MicroTest (20 N) module to your NanoTest greatly expands the capability of the system to cover both the nano- and micro- ranges. Both loading mechanisms are permanently mounted side-by-side, allowing easy transfer of the sample between both.
Materials commonly tested including cemented carbides, metals, shape memory alloys and hard coatings.
The MicroTest load range is suitable for:
A knowledge of both hardness and toughness is required to assess performance under severe mechanical loading. Even subtle changes to the % binder and carbide grain size in cemented carbides can have a dramatic influence on tool life. It is the sub-surface mechanical properties that control the fatigue performance in applications such as high performance stamping. Micro-Indentation is used to determine the mechanical properties of different cemented carbides.
Figure 2 shows the high load stamping wear of WC-Co tools. There is a clear direct correlation between the Micro-Indentation data and the tool life. The WC-Co with the lowest plasticity index has greater tool wear due to brittle cracking.
Figure 3 shows the variation in plasticity index with load for three commercial grades of WC-Co. Plasticity index = plastic work/total work. Even small changes can dramatically influence tool life.
Our support literature for MicroTest testing will provide a great introduction to the NanoTest Vantage, learn how you could be taking advantage.
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