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How does the Vicker’s hardness test differ from Brinell’s?

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How does the Vicker’s hardness test differ from Brinell’s?

(a) Duration of indentation

(b) Type of indenter

(c) Materials to be tested

(d) Load applied

The question was asked in a national level competition.

Query is from Hardness Tests on Metals topic in section Wear of Metals, Mechanical Properties and Testing of Engineering Material & Metallurgy

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Right option is (b) Type of indenter

Explanation: Similar to Brinell’s test, Vicker’s test also employs forcing of the indenter into the surface of metal for about 10-15 seconds. However, instead of a ball indenter, a pyramid-shaped indenter is used. This test is commonly also called the diamond-pyramid hardness test.

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