A single crystal of aluminum is oriented for a tensile test such that its slip plane normal makes an angle of 30o with the tensile axis. Three possible slip directions make angles of 58.4o, 72o, and 81.1o with the same tensile axis.
(a) Which of the three slip directions is most favored (most likely to slip)?
(b) If plastic deformation begins at a tensile stress of 1.95 MPa, determine the critical resolved shear stress for aluminum.
(c) Can you use the above-calculated Critical Resolved Shear Stress value as one of the mechanical properties of aluminum?