rapidly at low diagonal lengths, with the effect becoming more pronounced as the load decreases. Thus, at low loads, small measurement errors will produce large hardness deviations. Thus, one should always use the highest possible load in any test. Also, in the vertical portion of the curves, small measurement errors will produce large hardness deviations.

Nanoindentation tests

Sources of error

The main sources of error with indentation tests are poor technique, poor calibration of the equipment, and the strain hardening

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