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

Transcribed Image Text:

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 <110>/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%) 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 <110>/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%)