1. Evaluation of Composites Hardness MeasurementBy
D. Sameer Kumar

2. OVERVIEW Hardness Measurement Definition Types of Hardness
Vickers hardness

3. Hardness
Definitions :
Hardness is defined as the ability of a material to resist plastic deformation.
Hardness is a measure of how resistant solid matter is to various kinds of permanent shape change when a compressive force is applied.
Hardness is the resistance of a material to localized deformation. 

4. Hardness Testing
The Basic Procedure of Hardness calculation is Fundamentally same . Only differs in different indentations
General Procedure :
Prepare the Specimen
Apply Loads for sufficient period
Zoom the area of Indentation
Note the readings
Substitute in the Formulae
Calculate the Hardness Number
An Example of micro Hardness Tester
MODEL: HVS-10/50
MAKE : Metal Network Korea Company

5. Hardness Testing
Rockwell Hardness Testing – Diamond Cone Indenter is used
Rockwell Hardness Number HR = E - e
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6. Hardness Testing
Brinells Hardness Testing – Hard steel / Carbide Ball Indenter is used
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7. Hardness Testing
Vickers Hardness Testing - Diamond indenter, in the form of a right pyramid with a square base
d is the arithmetic mean of d1 and d2
To convert HV to MPa multiply by 9.807
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8. Hardness Conversion Charts
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9. ….. Thank You