ME 2733 : SolutionOfMidetermExam
Document Summary
Iron for metal, pottery for ceramic, plastic for polymer. The surface energy will be greater than the grain boundary energy. For grain boundaries, some atoms on one side of a boundary will bond to atoms on the other side; such is not the case for surface atoms. Therefore, there will be fewer unsatisfied bonds along a grain boundary. Proportional limit: division point between elastic and plastic deformation. Yield strength: the intersection point of the stress-strain curve and a parallel line starting from 0. 002: resilience: area under elastic deformation of the stress-strain plot. Because the ionic bond in ceramics is stronger than the van der waals interaction in polymer. 1. (a) from the data given in the problem, and realizing that 36. 12 = 2 , the interplanar spacing for the (311) set of planes for rhodium may be computed using equation 3. 21 as d311 = nl.
