Calculate the magnitude (in nm) of the Burgers vector for-Fe (bcc Fe), fcc Cu an

Question

Calculate the magnitude (in nm) of the Burgers vector for-Fe (bcc Fe), fcc Cu and for hcp Zr. From the result andusing the shear modulus, calculate an approximate value for thedislocation self-energy per unit line (J/m) in these metals. Please Help!! Calculate the magnitude (in nm) of the Burgers vector for-Fe (bcc Fe), fcc Cu and for hcp Zr. From the result andusing the shear modulus, calculate an approximate value for thedislocation self-energy per unit line (J/m) in these metals. Please Help!!

Explanation / Answer

In most metallic materials, the magnitude of the Burgersvector for a dislocation is of a magnitude equal to the interatomicspacing of the material, since a single dislocation will offset thecrystal lattice by one close-packed crystallographic spacingunit. The interatomic spacing is found for solid metals bydoubling the atomic radius.

For Fe-.124*2=.248 nm

Cu- .128*2=.256 nm

Zr- .159*2= .318 nm

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