Hardness testing is a precision science whose estimates are used in mechanical works. There are 4 different types of hardness testing, each with a different approach but with the same outcome. Vickers Hardness test is one of them. The system of hardness testing was designed as an alternative to the Brinell method. Whereas the Brinell process banked on ball size, test force, and sample dimension, the Vickers method derived its outcome from the ability of the indenter to penetrate the material.
How Vickers Testing Works
To get the measure of hardness of any material, the calculations are compared to how the material resists plastic deformation. What makes Vickers testing stand out is that it can be used on any material. Also, the size of the indenter does not influence the hardness of the material.
The pyramid-shaped indenter compresses the material to produce geometrical impressions. The impressions give the measurement points from which the hardness calculations derive. The Vickers hardness test is given as the Diamond Pyramid Number (DPH) or Vickers Pyramid Number (HV). The measurement scale is among the widest, which makes Vickers universal.
Reading from the Vickers test comes in xxHVyy/zz formula.
xx is the hardness number
yy is the mass of the test load while
yy is the time taken to load the mass.
HV is the material’s hardness.
The most popular Vickers Hardness test equipment is the Falcon series; 400, 450, 500, 600, and 5000.