The yield strength of a polycrystalline metal increases from 100 MPa to 145 MPa

Question

The yield strength of a polycrystalline metal increases from 100 MPa to 145 MPa on decreasing the
grain size from 64 Î¼m to 25 Î¼m. The yield strength of this metal (in MPa) having a grain size of 36
Î¼m is

Options:

A . 110

B . 125

C . 140

D . 165

Answer: Option B

-NA-

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