(1) Compute the dislocation density in tungsten if the flow stress is controlled by the stress necessary to operate a Frank--Read source. The shear stress in the slip plane is 50 MPa. Take G = 166 GPa (2) Calculate the total energy due to dislocations for copper that underwent 20% plastic deformation, resulting in a dislocation density of 1014 m-2. Assume that b = 0.3 nm (3) The Burgers vector of a dislocation is 0.25 nm in a crystal. The shear modulus G = 40 GPa. Estimate the dislocation energy per unit length in this crystal.
(1) Compute the dislocation density in tungsten if the flow stress is controlled by the stress necessary to operate a Frank--Read source. The shear stress in the slip plane is 50 MPa. Take G = 166 GPa (2) Calculate the total energy due to dislocations for copper that underwent 20% plastic deformation, resulting in a dislocation density of 1014 m-2. Assume that b = 0.3 nm (3) The Burgers vector of a dislocation is 0.25 nm in a crystal. The shear modulus G = 40 GPa. Estimate the dislocation energy per unit length in this crystal.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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(1) Compute the dislocation density in tungsten if the flow stress is controlled by the stress necessary to operate a Frank--Read source. The shear
stress in the slip plane is 50 MPa. Take G = 166 GPa
(2) Calculate the total energy due to dislocations for copper that underwent 20% plastic deformation, resulting in a dislocation density of 1014 m-2. Assume that b = 0.3 nm
(3) The Burgers
modulus G = 40 GPa. Estimate the dislocation energy per unit length in this
crystal.
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