Question
Download Solution PDFThe Vickers hardness number (VHN) for a material with a 20 kg load and an average indentation diagonal of 0.3 mm is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
The Vickers Hardness Number (VHN) is used to quantify the hardness of materials based on the size of an indentation left by a diamond-shaped indenter.
Formula:
\( \text{VHN} = \frac{1.854 \cdot F}{d^2} \)
Where:
- F = Load in kgf = 20 kg
- d = Diagonal of indentation in mm = 0.3 mm
Calculation:
\( \text{VHN} = \frac{1.854 \cdot 20}{(0.3)^2} = \frac{37.08}{0.09} = 412 \)
Last updated on Jul 2, 2025
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