Determine  the spacing between dislocations in a low angle tilt boundary in iridium ( FCC) when the angle of tilts are 2° and 4° Lattice constant of Ir is 3.84 Å

What is the coordination number for atoms in the HCP structure? How does this compare to the coordination number for FCC? How would you expect HCP and FCC to compare in terms of APF? Which would be greater? (or would they be the same?)

A metal has a certain fraction f = 105 of vacancies at the atomic level at finite temperatures. If the activation energy for vacancy formation was increased by 50%, what would be the new vacancy concentration? Select one: a. 7.43E-10 b. 6.22 E-5 C. 1.24E-6 O d. 3.16E-8 e. 5.48E-4

Q.1. Determine the Miller-Bravais indices for the plane shown with the question mark (?) in the following hexagonal unit cell. Note: Don't forget to explain and show all steps (īo10) az a3 a1 (0001)

Draw the following crystalline planes in a separate unit cell:

The following figure displays both an Edge Dislocation and a Screw Dislocation. Answer the following questions regarding the characteristics of each Dislocation Edge dislocation Screw dislocation

If the atomic radius for Pb- 0.175nm and the crystal structure is FCC, calculate the atoms numbers in the unit cell, find the relation between atomic radius and lattice constant and what is the atomic packing factor

5. Calculate Phkl for the (100), (110), and (111) planes of a monoatomic fcc crystal.