Scratch Testing E
Agilent Nano Indenter G200 User’s Guide E-9
Editable Post-Test Inputs
There are editable post-test inputs, as shown in Figure E-7.
Figure E-7Editable post-test inputs for scratch testing
Recalculate Critical Load
Determines whether the critical load needs to be recalculated based on
changes in the critical load calculation coefficient.
Critical Load Calculation Coefficient
The criteria for determining whether fracture has occurred. If the
roughness of the sample measured during the scratch is this coefficient
times the roughness measured during the initial profile of the sample,
then fracture has occurred.
For example, if the roughness measured during the profile was 10 nm
and the coefficient is set at 50, then the method determines that fracture
has occurred when the roughness exceeds 400
nm.
Roughness Coefficient
A scaling factor applied to the initial profile data for the purposes of
plotting, so that you can see an amplified roughness before the scratch.
Results
There are six results that are unique to scratch testing:
• Critical Load
• Penetration Depth At Critical Load
• Scratch Width
• Total Height Of the Groove
• Residual Scratch Depth
• Pile Up Height
Many of these are described by markers outlined in Table 1 and Table 2
on page E-8.
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