Consider fracture toughness testing for two notched samples of a material loaded in Mode I. The samples have different thickness such that the thinner one can be approximated by plane stress and the thicker one can be approximated by plane strain. Which of these is true?

When studying stress-strain behavior in tension, what is the reason for defining yield using the offset method (such as 0.2%, for instance)?

Define adiabatic shear fracture phenomenon, (typically seen during deformation at high strain rates)

Brittle fracture is more common in FCC metals compared to BCC or HCP.

List one advantage of torsion testing over tension testing.

Changing the strain rate of a tensile test typically has the following effect on behavior:

List two possible microstructural changes which can occur during creep. [2pts each]

Fill in the blank – [2pts for each blank] 90% of service failures due to mechanical causes occur because of ________________.

Anisotropy in engineering metals typically occurs in two forms: crystallographic anisotropy and mechanical fibering. Describe them using 1-2 sentences each. [3pts each]

Corn, beans, and squash are known as the three sisters.