Consider a metal single crystal oriented such that the normal to the slip plane and the slip direction are at angles of 60° and 35°, respectively, with the tensile axis. If the critical resolved shear stress is 6.2 MPa, will an applied stress of 12 MPa cause the single crystal to yield? If not, what stress will be necessary?  

A 150 mm long cylindrical sample with 15 mm diameter is stretched by a force until the diameter is decreased by 0.0023 mm. What is the applied force that causes this deformation? E = 104 GPa and v = 0.34. Assume the deformation is elastic.

Assuming the reciprocal method were used, from the simultaneous equations listed below, select the equations that correctly show the calculation that would be used to determine the fully reciprocated costs of providing the support department services. (you should select two equations from the list below, one for each support department)

  Which type of fracture involves  significant plastic deformation?

  Which of the following will likely fail in a brittle manner?

Tensile engineering stress-strain curves through failure are depicted below. Which of these specimens features the most ductile response?  

Nitrogen from a gaseous phase is to be diffused into pure iron at 675°C. If the surface concentration is maintained at 0.1 wt% N, what will be the concentration 2 mm from the surface after 25 h? The diffusion coefficient for nitrogen in iron at 675°C is 2.8 × 10–11 m2/s. Use the supplemental information. Initial concentration of N in iron is 0%

Which of the following is true for secondary creep?

  How would the plane strain fracture toughness of a metal be expected to change with rising temperature?

With increasing the number average molecular weight, the tensile strength of polymers typically