The yield strength of a material is 200MPa when the grain size is 80 m – McqOptions

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1.	The yield strength of a material is 200MPa when the grain size is 80 micron. If the frictional stress is 80MPa, find the strength when the grain diameter is 160 micron?
A.	100 MPa
B.	150MPa
C.	250MPa
D.	180 MPa
Answer» E.

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