Chromium metal has a metallic atomic radius of 0.200 nm. It shows plastic deformation via slip along the <111> directions.
a) What is the planar density (atoms/m2) for its densest family of planes? What is the magnitude of the Burgers vector for the dislocations that promote slip in chromium metal?
c) A chromium ingot has tensile stress applied at a 25° angle to the slip plane normal and a 63° angle to the slip direction. It experiences a resolved shear stress of 25 MPa. What is the total tensile stress applied to the ingot?Â
d) What is the maximum resolved shear stress, in any direction, for this applied tensile stress?Â
e) It is observed that polycrystalline chromium has a higher tensile stren than single crystalline chromium. Propose a reason for this difference in tensile strength.
