The document summarizes the results of a micro Vickers hardness test. The test was performed on samples with a load of 50 gf and dwell time of 15 seconds. The test measured the hardness of different phases using a small indenter, obtaining values between 196.3-259.1. The main drawback is needing to optically measure the small indents, requiring a polished surface.

1. Result and Analysis of Micro
Vickers Hardness Test
Department of Metallurgical
and Materials Engineering
INDIAN INSTITUTE OF
TECHNOLOGY KHARAGPUR

2. • It is used to determine hardness over
very small areas.
• Hardness of different phases can be
measured using this test.
• Indenter is the same as used in the
Vickers Hardness Test.
• The load applied in Micro Vickers test is
much smaller compared to the load in
the Vickers Test (1 – 1000 gf).

3. Results of Micro Vickers Test
Load = 50 gf, Dwell Time = 15 sec
Diagonal 1 Diagonal 2 Hardness
17.48 20.35 259.1
21.5 21.96 196.3
21.89 19.57 215.8
21.13 22.05 199

4. • The main drawback of the Micro
Vickers test is the need to optically
measure the indent size.
• This requires that the test point be
highly polished to be able to see the
indent well enough to make an
accurate measurement.

5. (a)Perfect Indentation
(b)Pincushion indentation due to sinking
in (Overestimation of diagonal length)
(c)Barreled Indentation due to ridging
(Underestimation of diagonal length)