Question: A hypothetical face-centred cubic metal has a lattice parameter a = 0.425 nm. A single crystalline bar made from the metal has a length

A hypothetical face-centred cubic metal has a lattice parameter a = 0.425 nm. A single crystalline bar made

A hypothetical face-centred cubic metal has a lattice parameter a = 0.425 nm. A single crystalline bar made from the metal has a length of 10 mm and a diameter of 2 mm. The Burgers vector of dislocations in the metal is /2. Assuming only one slip system is activated during uniform tensile straining and the angle between the direction of the Burgers vector of the dislocations and the tensile direction is 60. Calculate the number of dislocations needed to achieve an engineering plastic strain of 10%. (15%)

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